I don't have a good answer, because there is no good answer in Iraq. I can't promise them that Iraq will begin calmly moving towards order and functional government when we pull out.
The Real Iraq We Knew
Increasingly, military people have come out against the war. In this article from the Washington Post, 12 Army captains flatly state that we should get out now.
From the article:
U.S. forces, responsible for too many objectives and too much "battle space," are vulnerable targets. The sad inevitability of a protracted draw-down is further escalation of attacks -- on U.S. troops, civilian leaders and advisory teams. They would also no doubt get caught in the crossfire of the imminent Iraqi civil war.