LastDayWatchers know the truth of
If we're trying to understand why we see a Sunni-Shia battle unfolding across the Middle East, keep in mind that the primary cause is not that the Obama administration didn't intervene in Syria. It's because the Bush administration did in Iraq.
This sectarian power-struggle is the origins of the civil war that has been ongoing in Iraq for 11 years. It is the cancer that has spread beyond Iraq into other countries, from Syria to Lebanon.