As a dimocrat, its hard to feel sorry for Gaddafi who was in inhumane monster who murdered, tortured, his own people on a routine basis. And in numbers in the hundreds of thousands.
Yet what is hard to understand is the premise of this thread, sure it would have been noble if some detachment of Libyan rebels had treated the captured Gaddifi in a humane manner, but how it becomes a total indictment of the entire Libyan rebel movement is dubious. When the end question is and remains, will the people of Libya end up replacing one tyrant with another equally bad tyrant, or will the governance of Libya vastly improve? We don't know yet but it can hardly be worse.
In related news, Tunisia, the first jewel of the Arab spring, finally held elections and moderate forces won. As a democratic government replaces a dictatorship.