It has always been the case that some people have acted nobly and benevolently in the name of religion, and also that some people have acted appallingly and destructively in the name of religion. I wouldn't care to work out the statistics (I'm not that omniscient), but I am interested in where the ideas of nobility and benevolence, evil and malevolence come from, and why we prefer one to another. Perhaps, on the universal and evolutionary scale, might is right, and wiping out the weak and ill-fitting is after all a good thing. Nietzsche, for one, despised the religion of Christianity not for its historic crimes against humanity (such as are enumerated here) but for its weakness and meekness.
For what it's worth, I don't think might is right, partly at least on religious grounds, but proving it, that's another issue.