Secular mass murderers: book Death by Government R.J. Rummel - Clearly a book written for nothing but to insight violence on those not of his religion.
Josef Stalin 42,672,000 - The only true atheist in the bunch, so you get this one.
Mao Zedong 37,828,000 - Tao ... it is a religion, look it up sometime.
Adolf Hitler 20,946,000 - A christian convert exterminating another religious group because he thought the religion was evil (not the race as people are so easily fooled into believing since he WAS Jewish blood).
Chiang Kai-shek 10,214,000 - Believed himself to be a god, thus religious, duh.
Vladimir Lenin 4,017,000 - Agnostic, spoke several times that he was ordained by a god, just never which one.
Hideki Tojo 3,990,000 - Tao again.
Pol Pot 2,397,000 - Another agnostic, still relgious. If memory serves right he mention a god in some statements.
Back to my horror movies, untainted by religious zealots and fantastic. My religion ... well, we celebrate death.