ISIS-style groups hate 'fitnah' (fragmentation or sedition) and 'rafidah' (rejectors, of a certain succession), i.e. shiites, a perceived internal enemy of the

ISIS-style groups hate 'fitnah' (fragmentation or sedition) and 'rafidah' (rejectors, of a certain succession), i.e. shiites, a perceived internal enemy of the ummah, more than they hate non-muslims. This makes Iran _the_ enemy, and enemies of the enemy tentative friends, and friends of the enemy enemies. The US has never had any qualms cooperating with more or less nasty groups or regimes. They recruited the mafia to keep unions and socialists from gaining political power in Europe, exchanging a revival of the heroin trade for their own political gains.