Would democracy in Libya be good for the US?

Probably not, you would have a democracy of a bunch of fascists who don't believe in democracy but in Religious Totalitarianism and world wide Imperialism of it. These guys are our enemies whether we are theirs or not. You could wave a white flag, put up your hands, and they would kill all they could anyway. See it's in the Koran, it really is, there is no guess about it. They kill us all when they get the chance, or they have defied the commandments of Allah and they will end up in Hell. You know the crazy dude that said God told him to kill people? Well guess what? These guys are that guy and they all hear the same voices, their religious leaders reading the book they see as the infallible word of their almighty Allah / God.