Hitler killed too many people too fast, and so was defeated and destroyed in 12 years. Like the Nazis, Muhammad and his successors embarked on a program of dehumanization and genocide, but they pursued it gradually and intermittently instead of all at once, and so the movement they created is still going strong after 1400 years.
The whole religion is the projection of the personality of that one man, of his will to power, his sense that he was God’s Prophet, and that everyone must yield to him or die. That man created a nation of one billion clones of himself. That’s what we’re facing. That’s why I say that the key to understanding Muhammad is that he was a successful Hitler.
Islamic Terrorism in India 