I heard an analyst say.....
That simply because Bush has demonized some Muslims as "terrorists, that actually people that ARE Muslims are joining Al Queda by the droves.
We may be able to knock out some cells, but they are growing faster than we can stop them. And it will be like this until we remove ourselves, and let them fight their brothers instead.
Right now they have a REASON to fight us, we are in their country.
Once we're gone, they'll turn on each other.