Realigning borders is always messy. Further study of the area shows that the place has been conquered and reconquered time and again in recorded history. It is such a mess that borders cannot and will not solve the myriad of problems there.
Once solution is to let them fight it out and the last man standing gets the dubious prize. And before he sits down to dinner, someone else will be challenging him for the prize.
That’s what we should have done originally, but Bush pretended that Iraq was a country.