You can't defeat evil enemies by becoming like them. You can win a military victory, but then you have won it for nothing. There was far more than one incident, I might add.
By the way, I blame Clinton for letting the attacks happen. He set up the wall of information and ignored data mining intelligence that could have prevented the 9/11 attacks. I don't blame Bush for September 11th and I won't blame him if there is another terrorist attack. I do, however, blame Cheney, Rumsfeld and Gonzales for supporting and covering up horrific acts of torture. I'm not referring to keeping somebody under the hot lights for half an hour too long; I'm writing about Abu Ghraib level tortures that have occurred with disturbing frequency at American-run prisons such as Guantanamo Bay.