"The Islamic State of Iraq and Syria (ISIS) has just seized the Iraqi cities of Mosul and Tikrit, and is close to taking control of the nation’s largest oil refinery — indicating that the jihad between Sunni and Shi’ite Muslims is raging hotter now than it has in centuries, and isn’t going to die down anytime soon. . .the idea that the Sunni-Shi’ite divide, which is 1,400 years old and goes all the way back to the murky origins of Islam, is something that can without undue difficulty be “overcome” is a sterling manifestation of the general superficiality of Washington’s analysis of the Middle East, during both the Bush and the Obama administrations. - http://pamelageller.com/2014/06/sunni-vs-shia-explained.html/
Bush thought he could bring democracy to these warring groups and stop the killing; Obama thought he could pull out and the killing and chaos would not return. But looking at that big black blob (Shia) that is Iran, I suspect that’s where the problem is.