When people in Iraq keep fighting each other, we are probably best to stay out

I hear in the news that the insurgents taking over in northern Iraq are even worse than Al Qaeda. Even kicked out of Al Qaeda for being too brutal. How can anything be worse than Al Qaeda? Wasn't Al Qaeda about as bad as one can get? I guess Iraq doesn't work as one country. Trying to hold it together is just a waste of money, not to mention lives. Iraq is Kurdish in the north, Sunni in north central and Shiite in the south. The most stable part is the Kurdish area. I think Iran is trying to hold Iraq together, or at least keep the Shiite leaders in power. If we (USA) do the same, we are strange bedfellows to Iran. History makes strange bedfellows. I doubt there is much we can do. Iraq is bound to disintegrate for now, except for the Kurdish section. That part seems most stable of all.

On the other hand, remember Somalia being a mess? I now hear that it's starting to get better. They're just starting to get tired of killing each other, and/or the most violent have killed one another off.