ardent osama is not "just another madman" as you put it. He is a hero to large numbers of, but not all, Muslims.
His agenda, and presumably that of his admirers, is the destruction of Western civilization. He hates all western countries and hates America most of all. I am not sure where he stands regarding countries such as China but I think he will not tolerate anything except Islam ruling the World.
If you can not tell who is them and who is us then I suggest you study up a bit as knowing the difference may just save your life one day.