So I'm an Atheist but here's a hot take: most if not all religions are kind of equally compatible and incompatible with communism in the same way they're equally compatible and incompatible with capitalism. The concept of Diagetic Existentialism is largely concerned with realities that are understood to be fictional in nature but I also think it goes a long way towards explaining how you can simultaneous have the American religious right as well as people unironically proclaiming that "JESUS WAS A SOCIALIST" in the same timeline. They're both working with the same material and sources but at the end of the day its all kinda in what you choose to take away from it.