"There is not one ME majority Muslim nation that doesn't have an Islamic based radical violent minority which is openly tolerated or by a large portion of the remaining population. Sometimes the radicals are dominant as Iran is.
When I first got into Iraq and saw what was going on I gave Islam the benefit of the doubt and attributed what I saw as "just" tribalism and factioning. After some distance and perspective I find that the overriding factor in all of this is Islam as it is practised by the dominant cultures of Islam.
Saudi Arabia is where it starts, where the radical Sunni Wahabbi sect runs the religious show. Where Mecca is. Where Muslims go on Hajj for Eid, a religious holiday. Where no infidels are allowed."