Isn't that a bit of a one-sided, vindictive point of view? I don't know who are still being detained in Guantánamo, but if there are terrorists among them, shouldn't these key figures then also be rewarded?
I don't have the answer neither, but IMO the way the responsible people should be treated depends on their intentions, willingness to accept suffering of innocents, external limitations on their powers, and the net effect of their actions, not only on a seemingly simple case of wrongdoing.