We're getting off topic, but..
No one has killed more Russians in the 20th century than the Russians themselves. Stalin, Lenin, Czar Nicholas, etc. clearly outscored Hitler in Russian dead, and they are still killing each other as we speak.
One of my secretaries, a great woman, Russian Jew from the Ukraine, made a very memorable remark. A few years ago, when it was topical for the media to produce materials re. the profuse and bloody mafia and gangland activity in Moscow, I asked Valerya, "When will the killing stop in Russia, so that the people can begin to participate in a democratic capitalistic system?", and she replied confidently, "40 years". I was surprised that she could respond with such certainty to my question, which I had thought to be only rhetorical. I asked her, why forty, and she said, "because it will take two generations before the new people of Russia can shed their old habits, like, Moses, when the Lord made them to wander for 40 years for the same purpose." I think she made a brilliant comparison.