Let me qualify my statement about Jarrah being the "most attractive" terrorist.
While I, of course, agree that looks/attractiveness are subjective, I don't think there can be any doubt that Jarrah was portrayed as the most attractive to American audiences. He looked more intellectual than the others (he wore glasses while the others tied scarved around their heads), was neatly dressed throughout almost the entire film, and was the most quiet and subdued. This characterization certainly goes against the grain of how most Americans view terrorists. And I think, for most people: the less someone looks like a terrorist, the more attractive they are.