From a Q and A with Petraeus:
Question: So is sending this signal that we're not going to use these kind of techniques anymore, what kind of impact does this have on people who do us harm in the field that you operate in?
Gen. Petraeus: Well, actually what I would ask is, "Does that not take away from our enemies a tool which again have beaten us around the head and shoulders in the court of public opinion?" When we have taken steps that have violated the Geneva Conventions we rightly have been criticized, so as we move forward I think it's important to again live our values, to live the agreements that we have made in the international justice arena and to practice those.
http://www.dailykos.com/story/2009/5/29/736713/-Petraeus-Says-U.S.-Violated-Geneva-ConventionsWhat-Will-Cheney-and-Rush-SayRuh-roh for the right wing.