anyone who thinks there are rules in war is naive. the rules don't apply when it comes to fighting, the lowest blow usually wins. sitting back and claiming moral superiority while your country is being over thrown is not a viable option. countries do what they have to do to win. most people fight to win, not fight to look good. you never hear anyone say they feel good about losing and that they are proud of failing.
as for osama and that war, the u.s did what it set out to do and now it should pack up and come home and worry about the problems at home till attacked again. they did the right thing and everything they needed to do to win.