You don't 'preempt' you tunnel-visioned automaton. Have you heard NOTHING I've been talking about??? Pre-emption is an evil act because it's a guess, followed by direct action against a target who is, at least at that point, innocent of any wrongdoing. This is NOT Minority Report, and if it was I'd be in active armed revolution against it.
Drunk drivers should not be arrested until someone die
An armed man standing outside a kindergarten should be left to his own devices
Someone broadcasting his intents to murder his fellow classmates on YouTube should not be questioned
etc etc
YOU ONLY RESPOND TO ACTUAL FORCE.
And, lacking intelligence that originated in unlawful activities - i.e. most of the meaningful intelligence - who do you respond against? Even if another nation attacked you, how are you supposed to hit it back when you have no information about it? Google Earth?
My bet is you wouldn't support those actions, but this is very very similar. You can ONLY respond with force when force is ALREADY in use against you.
Really, even if this force is nuclear? You should actually wait until attacked before you do anything? Is that how a country protects its citizen, by a blind retaliatory force and zero prevention capacity?
Lets try imagining a sequence of events here:
The reasonable way:
1. Terrorists get a nuclear device from, lets say, Paksitan
2. American intelligence - unlawfully - intercepts their plans
3. The said terrorists are either kidnapped and brought to trial (or better yet, Gitmo) or assassinated by a Predator
Terrorists die.
Your peculiar way:
1. Terrorists get a nuclear device from, lets say, Paksitan
2. Americans don't know shit about it because their intelligence officers have been executed
3. Terrorists get to the US and sneak in
4. The bomb goes off, millions die
5. US scratches head on where to retaliate. Without intelligence, it's very difficult to pinpoint the source of the bomb
6. In the good case, nothing happens. In the not so good case, US retaliates against the wrong target with a nuclear device of its own.
Millions die. Earth is, possibly, destroyed. All because you wanted to be a smartass.