Look, we don't need to talk about just Stalin here. There is plenty of religious persecution at the hands of communism to go around. Try going to a communist country and walking around with a Bible or Koran on display and see how they react.
Yes, I cannot disagree with you. Again, this is Communism, not Atheism. Like I asked earlier, Science was one of the pillars used to propagate Communism, too. Should we shun Science?