You can go to the cable archive and type 'human rights' in the search box and see this isn't remotely true. Whatever one might think of US diplomacy and its goals, the cables are mostly of historical interest and cause for mild embarrassment. They don't really show some diabolically clever empire cynically manipulating the world. They mostly show it pursuing its publicly stated goals and interests - one can have a pretty dim view of these goals and interests but you don't need the cables to develop or support that viewpoint.