You're using a logical fallacy, using a false premise and drawing a false conclusion. Most of the world's greatest thinkers were atheist or spiritual but not religious. Does it make sense for an atheist to draw loose conclusions like that?
Stalin and all those others were atheists but still had a dogmatic belief in Big Government, something liberals and yes, the truth hurts, conservatives too. You all love government, big government your way. When it gets big enough, you get things like tyrannical police states and dictatorships.
Blaming religion on anything is stupid or using it to declare that you are somehow moral because of it.