Shiites, Sunni's and Wahabbi's have been at war with each other since the founding of that backwards 7th century religion named islam. That's a fact. Each sect thinks theirs is the closest to their child pedophile prophet, mohammed.
If we're going to pull out of Iraq because the Shiites that dominate the Iraqi Government (read that: Iranians) want us out, then I say pull EVERYTHING out of the middle east and let them go to war with each other.
It will be fun to watch the entire middle east be too busy killing each other to be able to attack anyone else.
Just be prepared to defend yourselves against muslims that are in every country world-wide. Once they go ape-shit crazy in the middle east, they're gonna go crazy and want to kill everywhere.
Time to put them down like the global scourge they are, IMO.