If it's that easy, why take anyone to trial? Why not let the government say whether someone is a murderer, or a thief, or a drug dealer, skip out the court, and execute them straight away?

If you haven't given him a fair trial, you haven't proved he is a terrorist.

When did Bush get the authority to decide that the Constitution doesn't apply?

Who is and is not a terrorist is very fluid.

I try very hard to not use hyperbolic, overly-passionate political rhetoric, and maybe I'm making a mistake this time, but I can't help but say:

Your mentality is what enables fascism, despotism, genocide, and gross in-humanity.

So the government can get rid of whoever they want just by labeling them terrorists/communists/whatever?