religions are fundamentally social structures built to set hierarchies and justify inequality
Incorrect, they are subsumed by the existing powers in much the same way that criticism of capitalism today is used to reinforce it. It does not mean that to point out flaws in capitalism is somehow bad or anti-communist.
Religious communes have been the closest thing to communism humanity has created before the industrial revolution, even if they were idealists. The heart of religion is revolutionary, the sigh for a future we can't imagine on earth. Don't confuse your understanding of Christianity in Europe during medieval times as a standard formula for religion everywhere.
See "they are subsumed by the existing powers in much the same way that criticism of capitalism today is used to reinforce it. It does not mean that to point out flaws in capitalism is somehow bad or anti-communist."
They have also been breaking class status and roles them since time immemorial. The first Christian communities were literal communes that formed autonomous zones in the Roman Empire which was partly the reason they were so violently suppressed. Even in countries where the "official" stance of the church was pro-state, there were hundreds of rebellions against this idea based on those same scriptures.