AQ was created by the U.S> as a network to faccilitate the ouster of the Soviets, Bin Laden was the same. the peaceful engagement and reconstruction on of Afghanistan would not only be the right thing to do, it would also deprive them of their unassailable tortuga.
eh, I don't think AQ itself was created by the USA, it was financed mainly by OBL himself IIRC. Lifting Afghanistan out of poverty would be a nice goal, but it wouldn't sidetrack OBL from his anger about having US troops in Saudi Arabia (close to Mecca and all that) and the USA's support of Israel. Afghanistan was just a place AQ chose to set up shop... if they couldn't stay there, they'd go somewhere else... probably Pakistan.