They even had Christians eating Muslims!
When is someone going to make a documentary about the Islamic Conquest of the 7th and 8th centuries? Notice that they never bother to elaborate on that bit of history, as if the Muslim caliphates just grew out of the ground of Iberia and Palestine. At least the Christians had a reason for launching the Crusades--to take back formerly Christian lands. What excuse did Abu Bakr & friends have for marching out of the desert and waging unproved war against everyone around them, other then a religious fanaticism which drove them to attempt to conquer and convert the entire world?