While a controversial figure, the historical fact is that Mohammed
was the leader of the Arabs, in a religious, cultural, and military sense. Especially since any Arab civ is just a mod, the choice of leaders need not be perfect from a religious sensitivity standpoint, though I kind of doubt that Muslims might object too strongly to their recognized prophet being depicted as leader of the people he really did lead into historical significance. (whew! A bit wordy).
Jesus and Moses would make much sillier choices for Civ leaders, given that Jesus never led more than a few hundred people, and for much of his career only about a dozen notable guys, and that he seemed to lack political ambition or power base. Moses did lead people, and a significan number of them, but they were nomads, and CivIII is of course city-based.
Come to think of it, Gandhi is nearly as strange a leader choice. Same for Joan of Arc. Ashoka and Louis XIV or Napoleon would be better.
Might not anti-Islam players object to an Arab civ in general? I suppose white supremacists might also object to the Zulus, Chinese, Japanese, Persians, Indians, Iroquois, Aztecs, Babylonians, Egyptians and possibly others, but I'm not exactly preoccupied with catering to such goofy ideas.
