What is the ruling on a Muslim female teacher—living in a European country—teaching the five religions to Muslim children, while being certain of the truth of Islam?

It is not permissible to study the distorted heavenly books, and false religions and doctrines, except with the aim of exposing their corruption and falsehood, provided that the student is firmly grounded in the truth and there is no fear of him being led astray. This study must be restricted to specialists who refute these religions, because allowing it for everyone, especially common people and children, may engender doubts. We have been forbidden from looking into any of them. The Prophet (peace and blessings of Allah be upon him) became angry when he saw a page from the Torah with Umar. Al-Hafiz Ibn Hajar holds that looking into these books is permissible for those firmly rooted in faith when there is a need to refute opponents. Sheikh Ibn Baz holds that it is not permissible to read them except for scholars who refute the People of the Book from their own books. This ruling applies to children a fortiori, because their intellects are limited, and they may not be able to understand the refutation of doubts.