It's not a popular opinion to have, and one I've not expressed much publicly. Terrorists use fear to accomplish their goals. You can't fight fear, you can only fight the source of it. It's like a dark area in the parking lot that could generate fear in somebody walking to their car alone. You can't fight the fear, but you can put a light up or do something else to minimize it.
The war on terror is more like a war to minimize terror (but a "war on terror" sounds better for the soundbites). When Bush said we can't win it, I was thinking people will see that he is intelligent and understands exactly what this war is all about.
I worry mostly that we won't be able to tell when something should be a mini-battle, or an all out expensive war.