Culture differences matter (even within Islam)

I've been keeping track of events in the Arab world only from a distance. There's been a lot of excitement on twitter and Facebook. Since I'm not an unalloyed enthusiast for democracy I've not joined in in the exultation. But I'm very concerned at what I perceive are unrealistic assumptions and false correspondences. This is a big issue because the public is very ignorant of world history and geography. For example, I was listening to a radio show where Roger Cohen was a guest. Cohen covers the Middle East, so he is familiar with many of the issues to a much greater depth than is feasible for the "Average Joe." In response to a caller who was an ethnic Egyptian American and a Coptic Christian who was concerned about possible persecution of religious minorities Cohen pointed to Turkey, which is ruled by Islamists, and has "many" Christians. His tone was of dismissal and frustration. And that was that. Let's look more closely. About 5-10% of Egyptians are Christian, with most estimates being closer to 10 than 5. In contrast, the non-Muslim minority in Turkey numbers at most a few percent, with ~1% often given as a "round number." This low fraction of non-Muslims in modern Turkey is a product of 20th century events. First, the genocide against Armenians cleared out eastern Anatolia. Second, the population exchange between Greece and Turkey in the 1920s resulted in each nation removing most of its religious minorities. Of the religious minorities which remain in Turkey, they have been subject to sporadic attacks from radicals (often Turkish nationalists, not Islamists). But from a cultural-historical perspective one of the most revealing issues has been the long-running strangulation of the institution of the Ecumenical Patriarch of the Eastern Orthodox Church by the Turkish republic. But that's not the big issue. Rather,