Islam proselytized by teachers who most likely are religion-despising atheists. But because Islamics are the enemies of Western civilization, the liberal teachers view this as an "enemy of my enemy is my friend" situation, oblivious to the fact that if the "pristine and peaceful" Islamics ever gained sufficient power they'd gut the teachers' union like a fish. ...literally. Leftists hate America more than they fear Islam.
Exactly, plus I believe many are too ignorant to know they'd be some of the first to go.