It’s not their fear of a wrathful god that keeps them from acting like this, it’s fear of the law, secular law, that prevents them. The entire concept of a god that is wrathful and willing to punish the wicked comes from this god punishing those that go against him, particularly those that believe in false gods or fail to worship him properly. If the government recognized their particular faith as the legitimate one, they’d have no problem discriminating against non-believers, and killing any who displeased their god. But we don’t recognize their faith as the truth, so saying “he sinned against god” is not a legitimate defense.