Whenever one thinks that our discourse regarding the Iraq War just can't get any more inane, it always manages to find a way. If the violence in Iraq continues to decrease -- and even if one accepts the most dubious of premises in order to see it all in the best possible light (the decrease will endure, it's because of the Magical Surge, the de facto ethnic cleansing can reverse itself, etc.) -- that rather obviously doesn't mean that the war has achieved anything positive, either in that country or for our own. It just means that we have begun to contain some of the monstrous harm which our invasion unleashed there.
Acting as though a decrease in violence is now a positive reflection on the invasion itself is irrational in the extreme. It's basically akin to someone sitting on their couch and chewing up food and spitting it all over the floor and the walls and the furniture month after month until it piles up and congeals and grows into mold, turning the room into a repulsive, health-threatening mess. Guests come by and run away in horror at how repugnant it all is.
Then, one day, the person decides to pick up some of the congealed food from the floor and scrapes a little bit off the walls, making it a bit less filthy. Then he starts calling his friends, announcing: "You must come over. I've completely redecorated my home and it looks beautiful now. You have to see what I've done to it."
That is pretty much an exact analogy to what is now emerging as Beltway wisdom regarding Iraq. We took a country that was relatively stable and a sworn enemy of, and an important check on, Iran. We turned it into a cesspool of violence, instability, displacement, sectarian strife, Iranian influence, and rule by militia.
The best we can hope for is to reverse some of the damage that we did so that a Shiite regime far more loyal to Iran than to the U.S. can rule with some semblance of order. And to "achieve" that, we squandered hundreds of billions of dollars, thousands of American lives, hundreds of thousands of Iraqi civilians (at least), and almost every ounce of credibility and influence we built up over the last six decades. That's the best case scenario.
And Bush is still waiting for his parade......