Let them kill each other in Syria?

"Despite the rising cry for intervention, U.S. observers also note that much of the current fighting involves various U.S. enemies who are attacking each other: Sunni jihadists in Syria are being joined by Iraqi Sunni insurgents across the border who are now sometimes fighting Hezbollah Shiites, as well as the Assad government. If it were not that tens of thousands of innocents are being killed and wounded, the conflict could almost be considered a "net gain" at this point in terms of "cold calculations of national interest," says Douglas Ollivant, the former director for Iraq at the National Security Council during the Bush and Obama administrations."