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I would say 99.9% of all Christians, even very hard core right-wing half crazy Christians like Jerry Fallwell would not aspire to the kkk belief system. I don't think you can say that for Muslems. There are probably 20-30% world wide with very extremists beliefs including leaders of nations.
Do you really want to get into this? What percentage of Christians participated in the Crusades? The ethnic cleansings in Bosnia? Lets talk about Bosnian Muslim women having their wombs cut open, their babies removed and then having a cat sewn in their womb in the name of Christianity. All religions have blood on their hands, with the possible exception of Buddhists and Jains. The degree to which that exist in each faith depends on when you ask the question.