This is why I don't jive with the state atheist types (apart from finding religions interesting). We see how the material conditions of feudalism naturally altered aspects of Christianity, and we see how the powers of the day consciously coopted it to entrench themselves and the system. In the Modern day we see the same thing except with Capitalism in lieu of Feudalism. I see no reason why Christianity or some other future religious movement wouldn't evolve as the material conditions do and as the mode of production changes and I see no reason why a Communist government couldn't coopt these things as well. Obviously I don't think this would include keeping Catholicism or American Evangelicalism as they would be holdovers from the previous eras, but to suggest that Christianity is inherently a tool of capital or feudalism just doesn't seem correct to me. Christianity and religion can be tool of class oppressions , but I don't see why that tool can't be wielded by the proletariat.