You have to fight fire with fire. You can't defeat an enemy that's playing dirty by being nice. These people hate us and want to kill us if torturing him saved lives it was well worth it
You realize they hate and want to kill us because we occupy their country illegally right? How would you feel if China was permanently occupying the USA to bring us the gift of Communism? Sound's silly right? Well that is what we do by permanently occupying 100's of countries in the name of Democracy. Our Foreign Policy is so ****ed there is no coming back from being the totalitarian authority without repercussions and in that you are correct, they won't play nice because we cheated first.
Everyone realizes that we did not actually declare war and the whole occupation is unlawful right? You can't have a "War on Terrorism" as it is an Ideal, you cannot fight Ideas, they just grow and multiply. Wait until their "War on Freedom", that is gonna be a DOOZY. America's policy problems begin and end with believing they/we have the RIGHT to tell others how to live their lives, that is literally the basis for 99% of our problems, not only as a country but as a Species.