I'm sorry, but I have read too widely and too many works by serious academics and analysts (I am not counting conspiracy theorists) to believe that bin Laden had anything to do with 9/11. Bin Laden and Al-Qaeda are proud terrorists, and would have proudly claimed ownership of 9/11. Instead, they have commended the "martyrs" involved in 9/11, but have never claimed to be part of it, or to have master-minded it.
To believe that Al-Qaeda is behind 9/11 is to believe the earth is flat, or that the moon-landing was false. The Americans had to kill Bin Laden, lest the truth come out. They could not take him alive.
So bin Laden is dead (maybe). Good-bye and good riddance. But it's no joy that his life was taken by yet another deadly terrorist imperialist group.