Lets not forget another aspect of communism, and that's that those deemed a threat to the state are rounded up and thrown into prison camps if not killed. In North Korea today if you're Christian they round you up and send you to a prison work camp that you're unlikely to survive. Maybe after a few years of re-education you might make it out if you convince them you're now a cog in the machine and left your Christianity behind, provided you supplemented your diet with whatever you could catch. This would also apply to anyone that speaks out against the regime. Those that don't know their history are doomed to repeat it.