It is an ad hominem attack.
You haven't even begun to address any of my actual arguments.
And yes, both theists and non-theists have committed crimes. However, there have been vastly more dead because of religion than the lack thereof.
In addition, no atheist killed theists in the name of their non-belief. The very concept is silly. Stalin and Mao killed millions for their own power, and for Marxism-Leninism. Their believe in that philosophy.
Their problem is much the same as believers. Once one believes in something no matter what, atrocities happen, because your belief overrides your rationality. Its happened to Christians, Muslims, Stalinists, Maoists, Hitlerites, etc.
Their one common thread is the abdication of reason in favor of belief in the Idea.
And that is the problem.