Only the presence of U.S. forces allows the group called "al Qaeda in Iraq" (AQI) to survive and function, and setting a timetable for the occupation to end is the best way to beat them.
...Several sources we reached in the Sunni community agreed that AQI, a predominantly Sunni insurgent group that did not exist prior to the U.S. invasion -- it started in 2005 -- will not exist for long after coalition forces depart. AQI is universally detested by large majorities of Iraqis of all ethnic and sectarian backgrounds because of its fundamentalist interpretation of religious law and efforts to set up a separate Sunni state, and its only support -- and it obviously does enjoy some support -- is based solely on its opposition to the deeply unpopular U.S.-led occupation of Iraq.
Raed Jarrar and Joshua Holland