On this I may just as well quote John McCain, in a statement in the senate shortly after the torture report came out:
http://www.mccain.senate.gov/public/index.cfm/2014/12/floor-statement-by-sen-mccain-on-senate-intelligence-committee-report-on-cia-interrogation-methods
“Our enemies act without conscience. We must not. This executive summary of the Committee’s report makes clear that acting without conscience isn’t necessary, it isn’t even helpful, in winning this strange and long war we’re fighting. We should be grateful to have that truth affirmed. Now, let us reassert the contrary proposition: that is it essential to our success in this war that we ask those who fight it for us to remember at all times that they are defending a sacred ideal of how nations should be governed and conduct their relations with others – even our enemies.
Those of us who give them this duty are obliged by history, by our nation’s highest ideals and the many terrible sacrifices made to protect them, by our respect for human dignity to make clear we need not risk our national honor to prevail in this or any war. We need only remember in the worst of times, through the chaos and terror of war, when facing cruelty, suffering and loss, that we are always Americans, and different, stronger, and better than those who would destroy us.
“Thank you.”