Is it unAmerican to suggest that there is some level of moral equivalency between what the terrorists do (e.g. torturing and killing innocent civilians) and what we have done in Iraq? Right-wingers scoff at such questions. I don't think that, even by the depraved standards of Bush's decisionmaking that America is really equivalent to al-Qaeda. However, I do think that we are, in many ways, on the same continuum as these psychos because of Bush's actions (as well as the nation's indifference to them) and rather than getting angry at the thought, we ought to come to terms with it and start fixing things.
What I do think it's reasonable to say is that America, by tacitly accepting such measures (and I agree with Kevin Drum here), has shown that we simply don't care about things like freedom, rule of law, and human decency. Maybe things are changing, and maybe this was a temporary lapse. I always worry about whether or not people are willing to die to protect civilization. Most people aren't even outraged when its tenets are violated. Have to stay alive to buy more shit, I suppose.
