Well, if you've listen to the Bush admin describe the fronts in the WoT, killing the terrorists is only part of it. They know a war of attrition is a loser. That's why they're trying to shut down the madrassas in Pakistan, trying to change the curriculum in Saudi schools, etc.
One thing I know Bush will not do is to simply wipe off the map those cities which are in control of the Jihadists.
While it's easy (and lazy) to say "Nuke Fallujah," fact is, that isn't going to happen. Therefore, the fact that an entire city is a "kill zone" is not relevant.
You're living in a dream world Guillermo.
It will take generations to change the minds and hearts of a certain percentage of Muslims. In the meantime, the operators will be hunted and killed. There can be no other way. Time is running out. WMD are proliferating and it should be obvious to you that they will use them if they can.
If you think you can attack the "root cause" while not attriting the islamofascist operators, you better think again.