UN torture investigator: Obama has broken International law
Obama no torture prosecution vow meets resistance
Yes, it would be hard to stomach making scapegoats of the torturers by not also punishing those who authorized and ordered it, as Bush/Cheney did following the Abu Ghraib abuses, but, frankly, that shouldn't be a consideration -- CAT specifically rules out the "just following orders" excuse, which has been roundly rejected since the days of the U.S.-led Nuremberg Trials. Are we really no better than the Nazis?
The Obama administration is obviously playing politics but can't have it both ways; either we're a nation of laws or we're not. There has to be accountability for Bush/Cheney's illegal torture regime, so, with the actual interrogators now improperly immunized (as long as they stayed within the guidance of the torture memos), the push must now re-focus on the upper echelons of the prior administration, even Bush and Cheney themselves.
Unfortunately Obama has shown no inclination toward holding them accountable, either, which means Congress should take up the reins. Senator Patrick Leahy, Representative John Conyers, and others have talked about commissions and hearings which could lead to prosecutions, and everyone who believes in civil liberties and the rule of law needs to vigorously support these efforts. Because in a representative democracy, if our elected officials allow torture to go unpunished, we are all ultimately complicit.