"Experts think the country's increasingly regional-oriented politics will fuel the insurgency and even spread it further inside Iraq. Others put forward a simple, disquieting scenario: So long as U.S. and other foreign troops remain in Iraq, the insurgency will continue.
'It will become more chaotic,' predicted Magnus Ranstorp of the Swedish National Defense College in Stockholm, Sweden. 'It is obvious that the United States is in Iraq to stay. If this is the case, the Shiites will likely join the Sunnis in the fight.'"
It wouldn't take much for the Sunnis to turn on their new allies. Once the security forces are large enough and efficient enough to fight the insurgency, they also become effective enough to fight the occupiers.