Sunni Vs Shia... lotta stuff in the middle east comes down to that.
Tip to POTUS: Let 'em fight. To the end. Then go in there and kill whoever is left.
Everything in the Middle East (and other Muslim areas) comes down to Sunni vs. Shia.
And we keep getting in the middle of these religious civil wars where we have no theological side.
There is nothing more un-american, and un-iraqi for that matter, than believing religions cannot possibly peacefully coexist.