Papalinton brings up the actions of Christians in Africa who harm children accused of being witches.
Why is this any different from bringing up the crimes of communists, and the persecution of religious believers in Communist countries.
You can't have it both ways. If these horrible actions by Christians counts against Christianity, then the crimes of atheistic communists counts against atheism.
These things were done by Christian theists, but not by Christianity. In the case of Christianity, we have Matthew 18:6, which says
"If anyone causes one of these little ones--those who believe in me--to stumble, it would be better for them to have a large millstone hung around their neck and to be drowned in the depths of the sea."
That's what Christ says about harming children, so Christians who harm children have to violate the teachings of its founder to do such things. I'm not even saying that the people who did these things are not real Christians. What I am saying is that they are violating the teachings of Jesus. You cannot even say that the actions of Stalin, Mao, et al, violate the fundamental teachins of atheism. Atheism does not require such actions, but it does not proscribe them either.