No way is religious tolerance is the issue here. They have had multiple games focusing on many different religions that involve both sides. I do not think Rise of Islam or whatever has ever been "popularized" to the extent something Like SHOGUN or even Three Kingdoms are for a non euro-centric game. Yeah, sure maybe why it islam hasn't been taught or covered as much in the past is because of that, but there is no way that is why CA isn't covering it. Also, I am pretty sure I have seen mods focus on the middle-east like:
http://www.twcenter.net/forums/forum...roken-Crescent