Thanks, guys...This is what I ended up posting:
Well, at first I thought I would copy another quote from "The Revolution" for you, but I think I'll just go with a more personal response.
It seems that if we were to withdraw the troops today, which should be easily done with a new administration, the immediate effect would be like taking the pressure off the pressure cooker. The terrorists hate us for our foreign policy. The reason they hate us in the Middle East is because we have literally invaded their land by setting up military bases, bombing their people, setting up police states in their countries, and imposing sanctions on them. These countries have been engaging in what the CIA calls "blowback." When you remove the stinger of the bee, the pain is alleviated. It seems that to continue as we are, the pain will continue and fester, and the pressure will remain on the cooker.
I think that because of this pressure, we as Americans are LESS safe from a future attack rather than more safe, which is the common reasoning.
Another consequence of the war is our erosion of civil liberties. Because of our interference in the Middle East, we have been subject to the Patriot Act and many Executive Orders that have given the people less liberty, while giving the Executive more power. These will likely never be reversed, the nature of big government being what it is.
Almost too obvious to mention are the lives and injuries (both mental and physical) spared, and the untold BILLIONS of dollars saved. Our dollar would be spared the debasement it has been undergoing because of efforts to pay for the war, and would probably recover somewhat from just the announcement of withdrawal from Iraq. Regardless, our country is on the verge of bankruptcy and the war does not help matters.