I don't understand why my Government does not want a regime change in Libya.
I don't think that there's any debate that they want it. The question is whether they feel they can pursue it while retaining enough of moral authority to allow any subsequent regime they support to be seen as legitimate by the people of Libya and the rest of the Arab world. Prior to Afghanistan and Iraq, American foreign policy was generally viewed as benign and they probably could have pursued it while retaining moral authority but those two conflicts have raised enough questions to make it a very, very grey area.