Ruling on teaching man-made laws

Teaching man-made laws
or studying them in order to explain their falseness and to distinguish
what is right from what is wrong, and to demonstrate the superiority of
Islamic sharee’ah and to show that it is complete and encompasses
everything that is in people’s interests with regard to their worship and
their interactions with one another is permissible, and may be obligatory
if circumstances call for it, in order to demonstrate what is true and
what is false and to explain that to the ummah and make them aware of that
so that they will adhere to their religion, and will not be deceived by
the specious arguments of the deviants and those who promote the rule of
man-made laws. It is permissible to take payment for this kind of work. 

But with regard to
teaching man-made laws because one likes them and wants to promote them, and
prefers them to Islamic laws, and opposes Islamic laws, this is a challenge
against Allaah and His Messenger, and is blatant kufr and a deviation from
the straight path. Taking payment for this is haraam and is evil upon evil.
We ask Allaah to keep us safe and sound and we seek refuge in Him from
misguidance. 

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

From Fataawa al-Lajnah al-Daa’imah, 23/497. 

See also question no.
12874.