Their holy book is filled with rape, murder, genocide, incest, and ritualized cannibalism in the name of their god. It ends with them going to heaven while everyone else gets burned for eternity. There probably are decent people who get involved, but their decency does not stem from their religion. It’s a psychological coping mechanism that has become a good old boys club that holds itself as morally unaccountable to anyone but god for their actions. In the real world, people expect others to either not be an asshole, or if they are, actually atone by paying the consequences and change their ways, not just whisper some words to the sky and announce “all good, I’m forgiven”. You can insert a lot of other religions in here- do wrong, be sheltered from consequences by your cult, or if even they can’t protect you, double down on refusing to take accountability because you don’t think you answer to other humans.