You really don't want to discuss Mohammed, do you? Yet he is the author of the Koran, and his evil character provides important context in which to best understand Islam. Nevermind the dismal 1,400 year record of Islam in practice, and its inherent antipathies to Western Civilization.
It took us about one tenth of that time to recognize that "true Commumism" was inherently brutal, because we could see the results wherever it was practiced. Islam is no better.