The US didn't invent 1,000 years of Sunni/Shia hatred.
Personally I think the conspiracy theories about the US creating ISIS is just mainstream Muslims embarrassed to admit they have a problem with their jobless and goal-less youth being indoctrinated and radicalized by fundamental clerics who can offer them something better than hanging out on the street corner all day.
Think about it, if you are a 20 year-old Arab kid whose been raised your whole life to believe the "Zionist entity" and the "Great Satan" is responsible for why you don't have a job or an education, what else is there to do but pick up an AK-47 and go join a Jihad adventure?
And in a society where women are secluded or covered, for a young male there is some mighty sexual frustration built up and being given free reign to rape and loot is a psychological release from daily repression.
Much true.
If you want to solve a problem you have to fix its root, it's almost pointless to hit the symptoms.