I gave up on Christians specifically when I discovered that Christians all believe different things. I would literally ask in chat rooms for a group to define one thing they all agreed on, and then watch as fights broke out - because when pushed they all disagreed violently on core ethics and dogma, and yet they also believed they were right and other people with different views "Weren't real Christians."

It turns out there is no real content to that kind of religion. It's all meta-justification for a person's existing moral leanings, and meta-interpretation of a "sacred text" which is broad enough to rationalise pretty much anything, including some appalling and terrible things. (History has plenty to say about that.)

The only true common belief is that religious self-justification is a valid and respectable process. That was the one thing they had in common.

Specifics and details were wildly variable window dressing, and heavily customised to personal taste.