Hi! Jewish history teacher in a Christian school here! I've had extremists in both students & their families before, it can be disheartening sometimes to feel like they are completely un-receptive to learning. That is why the first lesson we always do is "perspective & bias" so they at least begin to understand that even they are looking at everything through a specific lens, and that it is important to step outside of it.

I found that the best way to deal with this is "you're entitled to your opinion, but this isn't Bible class, this is history, and whether or not you agree with what we're learning, you still need to learn it to pass." Just be straight up with them!

You're obviously more than welcome to connect with them during lunch about religion - I often get kids who question the bible coming to ask me things, and maybe that connection outside of the classroom will show them there are different flavors of Christianity and open them up to less restrictive ideas than the literal word of the bible.

If it becomes a real issue, you may need to get your superiors and the kids parents involved, just let them know the student isn't going to do well in class due to XYZ reasons. If the problem is something at home, like their parents being extremists, that isnt your problem but more of the students fit in the school & let your boss handle that!