I hate to point out the obvious...
A. The poll is of Iraqi opinions, not U.S. military ones.
B. It should be noted that the hundreds of thousands of Iraqis in mass graves and the hundreds of thousands who died in Saddam's wars also did not get to voice their opinions on this recent poll.
C. If you want the military opinion, ask the ones serving in Iraq now. Reenlistment rates are still exceeding goals. Maybe not everyone thinks like you do.