Your polls prove NOTHING. First, they are only polls. People respond differently to "hypotheticals" than real life. Second, many times polls are wayyyyyyyyyyy off, they had Arnold losing...
And YOU need to examine your "trustworthy" polls a little closer.
All the polls have an error margin of 3-4 % PLUS OR MINUS, which means it can flucuate in error by up to 8 SWING points. In other words, if bringing the troops home NOW is 45 points in June, and 52 points now, that is a statistical tie, since the 45 points in June could be up to 48-49 points, and the 52 points now could be as low as 48-49 points, a TIE. So the polls done prove a diminishing support level of the public.
And your comment about the insurgency (dont you mean terrorists??-I mean, if they are destroying non military buildings, as you claim they might, that makes them terrorists, right?) destroying the 9 story building is irrelevant to the fact that people are investing in them, which PROVES the people KNOW the situation is getting better and more stable.