Her husband denounced her as a disbeliever because she will not denounce people as disbelievers

There is a great lesson for us and for all those who read
your question, which is so that we may see how specious arguments may lead
a person to damage his worldly and religious affairs, divert him from the
right path, cause him to deny the rights that others have over him, and
cause him to lose the closest of people to him, namely his wife and
children. All of that is because of ignorance, which is the worst enemy of
man. 

We will start with the personal aspects of your question,
which is the fact that your husband’s belief that you are a disbeliever does
not in fact have any effect on the marriage contract, so long as he has not
uttered the word of divorce. That is because his notion of regarding you as
a disbeliever, which he has come to believe strongly, is flawed and does not
count for anything. No scholar ever said such a thing and no shar‘i ruling
can be based on it. 

The reason for your husband’s confusion is his mistaken
understanding of the principle that “whoever does not regard a disbeliever
as such is himself a disbeliever,” which was quoted by Shaykh Muhammad ibn
‘Abd al-Wahhaab (may Allah have mercy on him) in Nawaaqid al-Islam,
where he said: … The one who does not denounce the mushrikeen (polytheists)
as disbelievers, or who has doubts as to whether they are disbelievers, or
who regards their view as sound, is himself a disbeliever. 

This principle is speaking about two groups of people: 

The first group is those who are originally disbelievers and
polytheists, such as the idol worshippers, Jews, Christians and those whom
Allah has called disbelievers in the Holy Qur’an, such as Pharaoh and Abu
Lahab. With regard to these people, whoever does not regard them as
disbelievers is himself a disbeliever. 

The second group is those who definitively fall into
apostasy, according to scholarly consensus, with regard to matters that are
part of Islam that no Muslim has any excuse for not knowing, such as one who
denies the resurrection, or rejects a verse of the Book of Allah, and other
kinds of blatant apostasy about which there can be no confusion and there is
no difference of opinion concerning them. These people too must be denounced
as disbelievers. Anyone who becomes aware of such people and their
situation, and proof is established for him with regard to the issue by the
scholars and fuqaha’, but he insists that they are not disbelievers, is
himself a disbeliever. 

This is a matter on which the scholars were unanimously
agreed, as was narrated by al-Qaadi ‘Iyaad (may Allah have mercy on him),
who said: 

There is scholarly consensus on the fact that the one who
does not regard any of the Jews and Christians, or anyone who abandons the
religion of the Muslims, as disbelievers, or who refrains or hesitates to
describe them as disbelievers, is himself a disbeliever.

End quote from ash-Shifa (2/281) 

Shaykh al-Islam mentioned some of the baatini (esoteric)
sects which are definitively proven to be disbelievers, as he said: 

The views of these groups are worse than the views of the
Christians, and contain contradictions similar to those in the views of the
Christians. Therefore sometimes they speak of divine incarnation, and
sometimes of the oneness of all that exists. So it is a view that is
self-contradictory. Therefore they confuse the one who does not understand
it, and all of this is disbelief, inside and out, according to the consensus
of every Muslim. Whoever doubts that these people are disbelievers after
coming to know their views and coming to know the religion of Islam, is
himself a disbeliever, like the one who doubts that the Jews, Christians and
polytheists are disbelievers.

End quote from Majmoo‘ al-Fataawa (2/368) 

With regard to issues concerning which there is controversy
as to whether they constitute disbelief, or where the matter is not clear to
ordinary people (non-scholars), or issues that are not quite clear, or
concerning which it is assumed that there is consensus but it is not
definitive, or concerning which there is a difference of opinion as to
whether the ruling on apostasy may be applied to a particular individual –
with regard to all these issues, it is not permissible to regard as a
disbeliever one who does not have a clear view on this issue, or who has a
different view, because in principle the issue of takfeer in these cases is
subject to ijtihaad and different views. So it is more appropriate that the
one who has a different view on takfeer in such cases is to be excused. How
could it be said of such a person that he is to be deemed a disbeliever, or
even be regarded as a follower of innovation or misguided? These issues do
not come under the heading of “the one who does not regard a disbeliever as
such is himself a disbeliever” at all, according to what was explained
above. Rather the clear, well-established principle is that certainty cannot
be undermined by doubt. Based on the former, sound principle, anyone who
claims to be Muslim and shows it (in words and deeds), and is content with
Islam, is to be regarded as a Muslim, and no one is to be deemed an apostate
unless it is proven in a definitive manner, not on the basis of mere doubts
or misinterpretation (of his actions). 

At the time of Shaykh ‘Abd al-Lateef ibn ‘Abd ar-Rahmaan ibn
Hasan – one of the leaders of the Najdi da‘wah and one of the grandsons of
Shaykh Muhammad ibn ‘Abd al-Wahhaab – some extremists went too far in
takfeer (denouncing people as disbelievers) because of their
misunderstanding of this principle. So he wrote to them, denouncing them and
saying: 

“In the year sixty-four, I came to know about two deviant men
of your ilk in al-Ahsa’. They kept away from Jumu‘ah and jamaa‘ah (prayers
in congregation) and regarded the Muslims in that land as disbelievers.
Their argument was like yours; they said: The people of al-Ahsa’ sit with
Ibn Fayrooz and mix with him and people like him who do not regard taaghoot
(rulers who do not implement sharee‘ah) as disbelievers, but nobody regards
as a disbeliever his grandfather, who rejected the call of Shaykh Muhammad,
and he did not accept it and he opposed it. 

“They said: Anyone who does not clearly state that he is a
disbeliever is himself a disbeliever in Allah, because he did not reject
taaghoot (rulers who do not implement sharee‘ah), and whoever sits with him
is like him. On the basis of these two false and misguided notions they
established the rulings that are applicable in the case of blatant apostasy,
to the extent that they stopped returning greetings of salaam. The matter
was referred to me, so I summoned them, warned them and spoke harshly to
them. First of all they claimed to be following the ‘aqeedah (beliefs) of
Shaykh Muhammad ibn ‘Abd al-Wahhaab, and to have copies of his essays, so I
discussed their specious arguments and defeated their misguided notions with
whatever I was able to in my meeting with them. 

“I told them that the Shaykh  had nothing to do with
this belief and view, and that no one should be regarded as a disbeliever
except on the basis of what all the Muslims are agreed that the one who does
it is a disbeliever, such as major shirk (ascription of partners to Allah),
or rejection of the revelations and Messengers of Allah, or of any of them,
after proof has been established and has definitively reached them,
such as denouncing as disbelievers those who worship the righteous or call
upon them alongside Allah, or treat them as rivals to Him with regard to His
rights over His creation of worship and devotion. 

“This is what the scholars and believers, and all schools of
thought, are unanimously agreed upon. They gave special attention to this
issue (takfeer or denouncing people as disbelievers) when they discussed the
rulings thereon and what constitutes apostasy and is regarded as such, and
they discussed the issue of shirk. Ibn Hajar paid special attention to this
issue in a book entitled al-I‘laam bi Qawaati‘ al-Islam. “The two
Persian men mentioned expressed repentance and regret, and claimed that the
truth had become clear to them both, then they left for the coast. But they
went back to the same view, and we heard that they regarded the leading
scholars of the Muslims as disbelievers because they send letters to the
Egyptian kings. Moreover, they regard as a disbeliever anyone who mixes with
any Muslim religious leader who wrote to them (the Egyptian kings). We seek
refuge with Allah from misguidance after having been guided. 

“We have heard similar things about you, and that you
indulge in discussing similar matters that no one should discuss except
scholars of great knowledge and those who are endowed with deep
understanding of the revelation of Allah, those who have been granted wisdom
and knowledge. 

“As for denouncing people as disbelievers on the basis of
these matters that you thought might render Muslims as disbelievers, this is
the way of the deviant Khaarijis who rebelled against the caliph ‘Ali ibn
Abi Taalib and the Sahaabah who were with him.” 

End quote from ad-Durar al-Saniyyah fi’l-Ajwibah an-Najdiyyah
(1/466) 

The Standing Committee were asked a question in which it was
said: 

In our country there is the phenomenon of widespread grave
worship, and at the same time there are people who defend those who do that
and say that they are still Muslims and may be excused because of their
ignorance, so there is nothing wrong with them marrying our daughters, and
we can pray behind them, and they have all the rights that one Muslim has
over another. 

In their reply they said: 

… It is not permissible for the people of Tawheed, who
believe that grave worshippers are disbelievers, to regard as disbelievers
their fellow believers in Tawheed who do not regard them (the
grave-worshippers) as disbelievers unless proof is established against them,
because their refraining from denouncing them as disbelievers is based on
what they think of as a good reason, which is that they believe that it is
essential to establish proof against those grave-worshippers before
denouncing them as disbelievers. This is in contrast to those concerning
whom there is no reason to doubt that they are disbelievers, such as the
Jews, Christians, communists and their ilk. In the latter case, there is no
reason to doubt that they are disbelievers, or to doubt that the one who
does not regard them as disbelievers is himself a disbeliever. And Allah is
the One Who grants success; we ask Him, may He be glorified, to set straight
the affairs of the Muslims and to bless them with understanding of their
religion, and to grant us and them refuge from the evils of our own selves
and from our bad deeds, and from speaking about Allah, may He be glorified,
and about His Messenger (blessings and peace of Allah be upon him) without
knowledge, for He is able to do that. 

And Allah is the source of strength. May Allah send blessings
and peace upon our Prophet Muhammad and his family and companions. 

Standing Committee for Academic Research and Issuing Fatwas 

President: ‘Abd al-‘Azeez ibn ‘Abdullah ibn Baaz 

Vice President: ‘Abd ar-Razzaaq ‘Afeefi. 

End quote from Fataawa al-Lajnah ad-Daa’imah
(2/150-151) 

Dr. Naasir al-‘Aql (may Allah preserve him) said – when he
was asked whether there was any difference between the idea that “Whoever
does not regard a disbeliever as such is himself a disbeliever” and the idea
that “whoever does not regard the polytheists as disbelievers is himself a
disbeliever” – he said: 

There is undoubtedly a difference, because most of those who
speak of the one who does not regard the disbeliever as such are referring
to one who is a disbeliever according to their own judgement, whilst others
may differ with them concerning their judgement. 

As for those who do not regard the polytheist as a
disbeliever, this is an issue that is undoubtedly clear, because the
polytheists are undoubtedly disbelievers, as are the hypocrites whose
hypocrisy Allah made known, although we cannot know who exactly is a
hypocrite. This also applies to the Jews and Christians, and everyone who
does not bear witness that there is no god but Allah and that Muhammad is
the Messenger of Allah – he is a disbeliever and whoever does not describe
him as such is in principle also a disbeliever, but this matter requires the
regular procedure to establish what exactly he is saying and what he knows,
and whether he is ignorant or not, and so on. 

End quote from Sharh at-Tahhaawiyyah by Naasir al-‘Aql
(67/15). 

To sum up, we advise you to be patient with your husband,
continue to advise him and treat him kindly, and refer him to people of
knowledge and understanding, in the hope that he will give up this attitude
of going to extremes in the issue of takfeer, and to give you your rights
that Allah has ordained for you, and to protect himself from the danger of
going to extremes and overstepping the limits. 

For more information, please see no.
85102 and 153830 

And Allah knows best.