I think a lot of the reddit type atheists are so far removed from religion in general they only view religious people as a cartoonishly idealized strawman that has no thoughts other than what their book says and their preacher teaches, who every second of every day is thinking only about god and how to be more godly and who believes the simplest interpretation of their religion. I have encountered it quite a few times as well since my username “outs” me as christian.

It’s that plus for muslims the sheer racism that makes for a particularly potent mixture of arrogance and ignorance resulting in this weird “white savior thats sneering at their lessers” postings