American fundamentalists especially, since I've heard that there are some absolutely wild beliefs getting passed around in those circles. Would love to hear from other folks though as well, since I've only had an outsider's view on this. I've heard that some of them believe that anyone who isn't religious is incapable of empathy, and of course all the Israel death cult stuff, but I'd like to know more.

Not necessarily dunking on Christianity as a whole here, even if I have some grave misgivings with how proselytization and child induction works in religion in general, this is specifically about borderline cultish stuff.