Yeah, I remember that post. It was a good one. Bottom line, as we learned in Vietnam, you can never beat a dug in insurgency without the support of the local population. And because of the ethnic/religious/historical context of the region, it is impossible for an American military presence to ever be more than barely tolerated by the masses.
Also, and I don't remember whether I posted this here or on DV, but during the Vietnam war, military strategists stated that in order to defeat an insurgency, an occupying army needs a 10 to 1 force advantage. Since the Iraqi Intelligence Service estimates the insurgency to be between 100,000 and 200,000 strong (depending on whether you consider "part time insurgents" to be fully part of the resistance)...well, you get the picture. We would probably need a minimum of 1,000,000 troops in Iraq to properly quell the insurgency, and we are having to extend tours just to keep PRESENT troop levels. Good luck with that!