I’m only skimming Tom Kratman’s Caliphate right now but one character, Mahmoud, a former Muslim turned Catholic points out to his wife
That its their atheism that’s a horrible weakness, it left a void that only religion could fill and how fanatics they maybe, the Muslim Migrants have a STRONG obsession with their faith and can sweep them away or something
Though, I heard once that part of these atheists’ problem is that they originally had much more religious parents and are only atheists as part of some counter culture and even without a God are trying to be devoted to “something” and are thus weak and vulnerable and finally manipulatable
It doesn’t help that they don’t even like Nationalism or their own nation or probably actually care about others’ welfare beyond being part of some rallies to stroke their egos and say their heroes of some sort