Insisting that radical Islamists have “nothing to do with Islam” has led US policy makers to commit numerous strategic errors since 9/11. One is to distinguish between a “tiny” group of extremists and an “overwhelming” majority of “moderate” Muslims. I prefer to differentiate among Medina Muslims, who embrace the militant political ideology adopted by Muhammad in Medina; Mecca Muslims, who prefer the religion originally promoted by Muhammad in Mecca; and reformers, who are open to some kind of Muslim Reformation. These distinctions have their origins in history. The formative period of Islam can be divided roughly into two phases: the spiritual phase, associated with Mecca, and the political phase that followed Muhammad’s move to Medina. There is a substantial difference between Qur’anic verses revealed in Mecca (largely spiritual in nature) and Qur’anic verses revealed in Medina (more political and even militaristic). There is also a difference in the behavior of the Prophet Muhammad: in Mecca, he was a spiritual preacher, but in Medina he became a political and military figure.