Another sweeping generalisation, that is demonstrable bs. I have seen many prominent theists defend genocide of course, William Lane Craig for example.
So can we assume
@Wildswanderer that you think the biblical deity was being evil and immoral when it committed genocide, and encouraged humans to commit mass murder, including children and babies in wars of ethnic cleansing?
There is after all no ideology, or whispering indivisible friend, to encourage atheists to do anything, so if an atheist commits genocide it their personal choice, and nothing to do with atheism, after all I am an atheist and find genocide appalling, including of course the many acts depicted in the bible.