Christians, why do you always bring up people like Stalin? Don't you realize they weren't TRUE atheists?

After all, a true atheist is somebody who never does anything wrong. Ever doing anything wrong automatically, retroactively, and by definition invalidates you as an atheist. So don't bother with your constant exclamations of "So-and-so is an atheist and he's a total jerk!" because so-and-so can't possibly be a true atheist if he's a total jerk! So-and-so must be a false atheist! In fact, he's probably a Christian just pretending to be an atheist, because he hates science and is too proud and rebellious to admit he's descended from earlier primates!