Nuff said.
Since all of Arab culture is so incredibly dysfunctional and based on lies and image and bluster over facts, it's important for these people to experience first hand who the real enemy in Fallujah actually is. Hint: they aren't wearing the Stars and Stripes. Telling them this six hundred billion times doesn't work, but showing them once by leaving the city alone so they can spill blood on each other is sometimes the only way.
I'm convinced the pullout of Fallujah was a deliberate Rope-A-Dope that will prove brilliant in the long run.
It's a nice demonstrator city for what happens when that city is run by terrorist nutballs.
I believe that the pullout of Fallujah was a stroke of genius. The people in the think tanks correctly surmised that without a common enemy, the Sunnis start killing even the sympathetic Shiites until the Shiites figured out that the enemy of my enemy is not necessarily my friend.