Having said that, I will also say that I don't agree that the terrorism against the US is a symptom of the civil war between the various factions of Muslims. That is a product the warmongering and imperialism of those factions in the US who are working to spread their empire around the globe (a kind of closed society in that a small ruling elite decide the fates of most of the people in the world, as opposed to respecting the right of all peoples to self-determination).