

Communism means the abolition of money, the market, and the state.
Market socialists/mutualists/whatever are not communist. They have different explanations for how they intend to dodge the flaws of markets.
Most anarchists will be communist in their economic views.

I was very antagonistic because I grew up an atheist in a conservative ultracatholic hell. Now I live in a chill place that used to also be conservative ultracatholic hell. I got to meet religious people that didn’t sincerely believe that I deserve to be tortured forever for not believing in what they do, who aren’t bigots, who believe in abortions, who hate rapist priests. When people aren’t mad at you all the time, it’s so much more peaceful to reciprocate.
It’s easy to fall into antitheism when the only religious people around you are structurally supporting evil, it’s hard when you see that people can actually have a positive relationship with their religion and community, even if they are incorrect about some metaphysical truth.