Fucked up

If you believe that 9/11 was an inside job (which I do), then basically someone went and murdered a man after a supposed 10 year hunt for him, and America is celebrating this. What about that is ok? Why is it ok because Bin Laden is a bad man and the guy who did killed him is a Navy SEAL. Why does that make it ok to kill a person? What a fucked up world we live in.