Obama, Islam and Christianity

President Obama recently said we shouldn't get on our high horse and condemn Islam for violence because of things like the Crusades, the Inquisition and other evils that Christians supposedly commited in the name of their religion. Many critics have reacted harshly to his interpretation of history. But, even accepting, arguendo, his premise, the most obvious conclusion is that Islam is a primitive and savage religion that is centuries behind Christianity. Why hasn't it "evolved" over the past centuries? That's the obvious question that is raised by the President's comments.