How to call a Christian to Islam

Before
replying to this question, I would like to say how impressed I am with my
brother’s concern to call people to Allaah, using the developments in
computer science to further the mission of the Prophets and Messengers
(peace be upon them). May Allaah reward him with the best reward, and record
him among His righteous slaves. With regard to the question you asked: 

The best way
to call this man and everyone else is that which is indicated in the
Qur’aan, where Allaah says (interpretation of the meaning): 

“And
argue not with the people of the Scripture (Jews and Christians), unless it
be in (a way) that is better (with good words and in good manner, inviting
them to Islamic Monotheism with His Verses)”

[al-‘Ankaboot 29:46] 

“Invite
(mankind, O Muhammad) to the way of your Lord (i.e. Islam) with wisdom (i.e.
with the Divine Revelation and the Qur’aan) and fair preaching, and argue
with them in a way that is better”

[al-Nahl
16:125]

And the
command which Allaah issued to His Prophet (peace and blessings of
Allaah be upon him) when He said (interpretation of the meaning): 

“Say (O
Muhammad): O people of the Scripture (Jews and Christians): Come to a word
that is just between us and you, that we worship none but Allaah (Alone),
and that we associate no partners with Him, and that none of us shall take
others as lords besides Allaah”

[Aal
‘Imraan 3:64]

-Tell him about the innate
nature of man (fitrah) which predisposes man to believe in Tawheed or
the Oneness of Allaah, and how the doctrine of trinity contradicts that
innate human nature and common sense.

-Explain to him the status that
‘Eesa (Jesus – peace be upon him) and his mother have among the Muslims, and
that he is the slave of Allaah and His Messenger, and His Word which He
bestowed upon Maryam (Mary), and a soul created by Him.

-Explain to him that the
religion of Allaah is the same from Adam to Muhammad (peace and
blessings of Allaah be upon him), and that it is Islam. Tell him that the
differences are in the laws and that Muhammad (peace and blessings of
Allaah be upon him) is the Seal of the Prophets (i.e., the last of them) and
that his Book abrogates the rulings which came before and confirms the true
beliefs and stories that were mentioned in them.

-Answer his questions calmly,
and provide him, if necessary, with some of the books and tapes by Shaykh
Ahmad Deedaat.

 Answered by
Shaykh Dr. ‘Abd al-Rahmaan al-Qaadi, Imam Muhammad ibn Sa’ood University,
al-Qaseem Campus

 You could
also send him Question No.
2690, entitled A serious dialogue with a
Christian from this site.