A very interesting topic. I think the mistake that most people make is to view the political boundries in the middle east. In truth people are
probaly more loyal to there tribe or ethienic group then to there countrie.
AUDI ARABIA DOWN THE MEMORY HOLE: BACKING SADDAM
What else is missing from the enormous coverage of Saudi Arabia? One element that is hardly mentioned is the long strategic compact between the House
of Sa'ud and Saddam Hussein (united by their fear of their Shia populations, and of Shia Iran).

link
The trouble started after WW1 when France and Britain put colonal interests before granting the variouse tribes the inderpendence they were promised.
From then onwards it was a slow decay into todays troubled region.
The western world took thousands of years to go from tribes to what we have to today how were the arab tribes spose to go thou the same process in 80
years?
Now that we know that the source if the insurgency spans political boundries the measures to stop recuruitment will have to as well. As far as I know
the last person to untie the Arabs behind a common cause was TE lawance. Any future leader will have to use tribal and ethenic loyalties to unite
Iraq.
The future leader faces the juggling act of the needed allied presence and the desrie of the Iraqi people to be free from occupation.