Maybe they are. Some atheists are very dogmatic and religious and tribalistic so they of course worry about things like that.
That's kind of why I'm asking.
I think Karl Marx's view was that if everyone's needs were met, people would no longer need religion. Although I think he thought this would happen naturally not via enforcement.
Kind of the individual saying "I'm happy, I'm content. All of my material needs are being met. I no longer need religion as a crutch to keep me happy/hopeful."
I really think he saw religion as a crutch. That once they were "healed" by communism I suppose, they would no longer need the crutch.
So either Chinese communism isn't fulfilling the promise of communism or Marx got it wrong.
At the same-time other atheists have said religion is a crutch. Myself, as an atheist, I don't really have an argument against that view. I'm letting other people make that argument because maybe there is something me and other atheists are missing.