Really Mishap and others, this is a thoroughly sterile argument which you have made many times on this forum.
Sadly, human being have killed each other, mutilated each other and enslaved each other since time immemorial.
This is a manifestation of flawed humanity and a simplistic blaming of 'religion' as a cause of this is just ridiculous.
Anyone with just the most basic knowledge of history will recall the six million Jews killed by the Nazis under the leadership of the atheist Hitler. The millions killed by the atheist Pol Pot, the slaughter of the Armenians, the genocides in Africa where the Hutu murdered the Tutsis, the terrible slaughter in Equatorial Guinea, and so on and so on. No one with an ounce of sense would blame this events on the fact that their perpetrators were atheist. They happen for a multitude of reasons bound up with the history and development of nations or tribes and are often the consequence of a struggle for resources, although not always.
Let's for once just condemn inhumanity whenever we find it, wherever it happens and whoever is the perpetrator.