So have atheists. Your logic is clearly flawed. They did not commit these crimes because Christianity promoted it. Never. Rather its because of humanity's inherit stupidity and sinfulness.Charities and 'various programs' are not exclusive to christianity.
How bout I get a group of people together, start a war in the name of that group killing millions, persecute people because they are different to me and have sex with little children. Oh wait there is already a group like that called christians.
I can as easily say, Atheists are rapists, murders and killed millions more people than Christians. Therefore atheists are evil.