Joseph Stalin, Atheist: 20 million plus dead -- But he didn't kill in the name of atheism, he killed indiscriminately for political reasons (And arguably sheer incompetency/nationalist hate for certain groups).
Mao-Tse-Tung, Atheist: 40 million plus dead -- Again, not a slaughter in the name of atheism or inspired by atheism. See points regarding Stalin.
Pol Pot, Atheist: 2 million dead -- Killed not in the name of atheism, but in the name of a batshit insane anti-education/purification movement that was arguably in and of itself a religion.
Kim-Il-Sung, Atheist: 5 million dead -- See points regarding Stalin and Mao. Just because someone is atheist doesn't mean it's automatically the reason they do (x); Atheism is not a belief. It's a lack of belief.
Fidel Castro, Atheist: 1 million dead -- Points one, two, three and four all apply here to some level.
Pope John Paul II has killed countless millions through denying condom use (AIDS is not just a "faggot disease"), to say nothing of other indirect deaths through medical ignorance, intolerance of various groups and so on. Oh, and his successor? An ex Hitler Youth.
Anita Bryant campaigns against homosexuality, so she likely may be responsible in some small fashion for the death of Matthew Shepard or other gaybashing victims. She furthers ignorance, and an ideal damaging to the development of children. Her destructive influence will harm millions of Christian indoctrinated individuals judgement.
Pat Robertson, is responsible for propagating the same tired hate rhetoric, scientific ignorance and usual fundamentalist nonsense. He will likely have cost the nation, or even the world, billions economically through inspired scientific ignorance, medical ignorance, and overt faith-inspired hate crime.
The former five did not act in the name of atheism. The latter three acted in the name of various Christian sects. Your comparison does not hold water. Christianity, is mass oppression.
