Generally, I think Americans are just a little more rude when it comes to these things and also can't admit to doing wrongs like other countries have. America still can't admit it lost Vietnam.
I know many, many people who will not only admit we lost the Vietnam War, but who will argue that the Vietnam War was an illegitimate war we should never have been fighting in the first place.
And if you really think that Americans can't admit that our government has done wrong things, I'd invite you to consider the hundreds of thousands of people who opposed the Iraq War and participated in numerous marches, protests, and demonstrations against it.
I really think you're stereotyping.
USA has a democratically elected leadership, correct?
This means the politics of said leadership has the support of the majority of americans.
I mean, that depends on the situation. President Obama, for instance, went from a job approval rating height of 69% to
his current rating, which is 42. Meanwhile, the United States Congress
has an approval rating of something like 12% (and I've been hearing 9% reported on MSNBC lately).
Add to that the corrupting influence of money in presidential elections -- and the argument that American democracy has been so corrupted that in many instances, it is no longer truly a democracy so much as a semi-democratic plutocracy.
So, no, the politics and policies of American leadership do not necessarily have the support of the majority of Americans. Certainly at the moment, neither the President nor Congress have the support of a majority of Americans.
Yes, many are opposed to it - but these 'many' are the minority.
Well, in the specific case of the Iraq War, many thousands were against it from the start but were, yes, in the minority. As the war dragged on, a majority of Americans came to change their minds and realize that they had been wrong to support the war from the start.
As an example of blatant 'all men are equal, but some are more equal than others' on USA's part - USA soldiers stationed in other countries can get away with manslaughter (driving while drunk and killing a person) simply because they're american soldiers.
The speeches given by USA leaders about democracy, freedom, human rights and all the other uplifting values, on the other hand - top notch.
Theory is easier than practice, yes?
I think if we want to debate the merits of the United States's Status of Forces agreements with host states, that's an entirely different level of topic drift and probably best left to TNZ. (For the record, though, I'm fairly happy to argue that the United States's SoFAs are unjust, and troop immunity from local law is one of the reasons I would tend to cite.)
But my point wasn't to say, "The United States Government is righteous and pure." My point was to simply say that there is a wide variety of opinions and ideological conflict in the United States, and that it's stereotyping to say that most Americans think or feel this way or that way in general about foreign cultures.
Just like it was stereotyping for some Federates to think that most Klingons can't talk or for some Klingons to think that the Federation is a "
Homo sapiens-only club" in
Star Trek VI, which is why we shouldn't take the Klingons' assertion about the Federation to be evidence that the Federation is not a sovereign state.
(w00t. Didja see what I did there, looping the topic drift back to the more directly on-topic question of political systems in the Trekverse? I'm pretty proud of myself for that.

)