It's more of a coping mechanism, is it not? I've read roughly half of the things you've listed, but definitely don't remember most of the nuances.
By default, people don't know (or care) about philosophy, and religion is a type of philosophy. It's a bit like bashing people for not taking the time to read Kant.
I think that thebproblem is that people that haven’t taken the time to read Kant most of the time do not attempt to criticize or discuss his work.
People criticize religion without extensively reading the theology because religion is a lived experience in a way that Kant isn't.