The US policy in the middle east is one of destabilization. ISIS is not a threat to American interests, it's a tool created by America to keep the region destabilized. Once energy is either no longer the limit to economic growth, or no longer economically efficient from oil, then the Americans / NATO and the Chinese can allow a more stable middle east. But the threat of foreign control over a very important and wildly swinging energy input, as well as a strategic launching point to many threats, leads to US / NATO foreign policy in the region that leans towards destabilization and fracturing interests in the region.