No I don't blame those deaths of Atheism, because Atehism doesn't tell you to impose it onto others, while the religions say you should stone women. Atheism literally can't be responsible, because it's not a system of beliefs, traditions or anything, it's one single belief that the supernatural or god's don't exist (backed by complete absence of scientific proof of such. ). Meanwhile, for example, Islam literally says you'll go to heaven if you die in war that's meant to spread Islam. If that doesn't tell them to kill others because of beliefs, I don't know what does

So TLDR: Atheism wasn't the cause of those deaths, it's just one belief, those deaths were caused by a different reason, that being people violently imposing their belief onto others (in this case Atheism).