Evolution isn't being blamed for mass murder. Its said that evil people used the idea of evolution expanded into racial superiority to support their quest for ultimate power.
Like you say there are plenty of bad people throughout history. There are also plenty of hypocrits, in and out of a church.
Yep, but when this is posted the implication is that because the theory of evolution can be twisted to support evil, that means that the theory of evolution is inherently evil.
It comes up quite frequently.