Rachel Carson (author of "Silent Spring" which resulted in the DDT ban): 50-80 MILLION deaths and rising every year.
Margaret Sanger: 46 MILLION deaths worldwide EVERY YEAR (850 MILLION to 1.2 BILLION worldwide since 1900).
Stalin: 13 MILLION+ deaths.
Hitler: 12 MILLION+ deaths
Mao: 50-80 MILLION deaths
So, in just the last century, atheism is responsible for the deaths of AT LEAST 975 MILLION INNOCENT people. (And note that this only counts the genocide that can be directly attributed to them, if the wars initiated by Stalin, Mao and Hitler were included there would be close to 100 MILLION more.)
I’ll give you all the rest, but Hitler was a Christian. Didn’t ACT like one, but thought of himself as one. As did the rest of the Nazi’s. The Spanish Inquisition weren’t exactly nice guys either. Some people, like many you have listed, espoused atheism for purposes of convenience - in order to excuse their actions. This should be rightfully condemned. However, there are many others who espouse atheism for reasons of high conviction and intellectual honesty. I do find the stridence of some of these people to be quite annoying, in the same way I find the stridence of Creationists to be annoying. They claim to knowledge they cannot and do not possess.
Just exactly who did Margaret Sanger kill? Are you talking abortions?