It is sort of pointless to judge any country and its history through a) the lens of history books and b) with our modern set of morals and views.
A lot of atrocities and inacceptable situations of the past centuries began as being perfectly acceptable during their time, and due to various reasons became to be considered horrible, and subsequently were fought against, abolished, or ... well, lamented at least.
I think a lot of us, myself included, during the late 90s really had this idea of the western world having gone above a certain kind of behaviour as political and military entities. I actually did believe in stuff like the geneva conventions to have influence. When I started to serve in the german army, a lot of those views were challenged, and mere weeks later after the start of my service, 9/11 happened and from then on, it kinda went downward. Or did it? Nowadays, I simply think the curtain of illusion we had about ourselves got ripped, which happens now and then in history.
Several decades of relative peace and stability, the increasingly manipulative media coverage of events in the US media certainly not helping things either, made a lot of us believe in a world that really isnt there, at least not yet.
See, the USA probably never were above torture. But for 20, 30 years, it had not officially happened, so people assumed it was gone, because it doesnt fit into the morals and values of our current society.
Politicians, the military, secret agencies or whoever else knew about it were wise to shut up, and really, who wanted to know anyways? Amnesty International?
The german military taught me, quite early, they never intend to play by the rules if certain things happen, among them an attack on german territory. At the time, I kinda thought this was a bit megalomaniac, and that we wouldnt get away with breaking almost all the rules in the book.
After the wars in Afghanistan and especially Iraq, its now clear to me that at least those officers who taught me back then knew more about reality than I did. The USA got away with it, germany would too, and those not blinded by a curtain of nice, tidy, clean values and treaties know that, and have known it all along.
The USA arent alone in that. You guys may have been showing off with the moral higher ground a bit more, you may claim the more epic rhethoric or more "just causes", but thats more a matter of different political style and patriotism than anything else.
The USA was just the first to have reason to break the curtain of civility of the western nations to this degree. Its by no means the only nation which, given comparable reason, would do so, though.