I wonder if you can realize that the reaction you see to your statements / behavior on this message board are analogous to the WORLD's reaction to your recommended course of action.

If we "killed all our enemies" in the non-discriminating way you advocate, we would essentially have to kill EVERYBODY as what you describe would make more enemies.
The government's own intelligence report demonstrated that our CURRENT actions in Iraq are stirring a hornet's nest of previously sleeping hornets. We are CREATING NEW enemies and INCREASING the amount of terrorist element in the region. Not decreasing it.

I would be curious as to a similar intelligence report regarding our actions involving Afghanistan. If I recall correctly, we even had a good amount of support from the Middle East BECAUSE they saw our response as justified.

The phrase "pyrric victory" comes to mind.

If we applied your mentality to "banning" your "enemies" on this message board, I think you would be quickly talking to yourself...