quote from the comments
"The point is that it is dishonest to pretend that the Crusades count against theism but that Stalin doesn't count against atheism. But what you fail to realize the reason they killed people was their dogmatic belief in things like communism and the fact that they were totalitarian governments. So it really was caused by atheism because atheism is the lack of faith in a deities or the supernatural."
It seems a lot like he is trying to equate communism to atheism, which would automatically nullify his point in my book.
In any case Stalin doesn't count against atheism (correct me if I'm wrong I may well be) because he was not trying to spread atheism.
I took a vicodin for the pain in my incision and I am feeling really trippy. Maybe I am totally misguided and not thinking clearly. Am I even making sense?