They are only emboldening the enemy. [snicker]
Apparently Rumsfeld and Abizaid no longer share the optimism of the keyboard blowhard as to whether this war is militarily winable. In the absence of any serious effort to cut off funding from the Gulf or the flow of jehadis from Syria it's not.
What the keyboard blowhard does not comprehend is that the jehadi isn't a soldier. He's a warrior. The focus of the soldier is on military victory and in Iraq the insurgents cannot militarily win. The focus of the warrior is on glory and being a hero. Every jehadi who comes home from fighting the Americans will be a hero for the rest of his life to his countrymen. Given that appeal, the supply of recruits is inexhaustible.