>>20358519They get angry and fiendish because someone believing in God breaks their echo-chamber. Pic related, these people are mostly some sort of heavy sinner (and always unrepentant) so they know that if God exists they are going to hell almost certainly.
If nobody believes in God or mentions God, then they can mostly keep the little voice at the back of their head silent, but the moment they see God in some way mentioned it's basically a trigger for them.
