I agree with your assessment. Guantanamo should be closed.
If these were people captured in Afghanistan, they should be tried there. This whole enemy combatant thing is ridiculous.
You are either guilty of a crime or not. If not, let them go. If yes, then be tried in a court and get a sentence.
To send them to a detention center in Cuba to get out of applying US law is nothing more than human rights violations. I am sure the hawks would quickly argue that is necessary until they find that their civil rights are violated.
It is a really sad state of affairs.