If you think Christians are unable to commit horrible acts than you have a very poor grasp of history, I’m afraid. Or are you one of those “they were not REAL Christians”. That reminds me of all the unrepentent Marxists who claim that Communism just hasn’t been implemented correctly.
In both cases it’s a intellectually dishonest position.
Of course Christianity has been a overwhelming force for good in history, but many individual Christians, even some motivated primarily by their religion, have done many evil things.
Christian beliefs are not a magic prescription that prevents acting badly, or commiting evil acts. Would that it were, but it is not.
You may want to reread my post again.