The truth of the matter is that we went into two countries, tried to change the regime by calling it "nation building" when it doesn't matter which group is in charge.
Killing each other is a way of life for them, and it will continue to be so for as long as they exist.
The only way we could ever keep the peace between the tribes is to have thousands of our military in their country on a permanent basis and expect some of them to be killed on a regular basis.
Take a look at the past twelve years. Has anything changed in the two countries at all?
I don't care who's president, or who runs the military, the above facts won't change.