You haven't been to America much, have you?
The popular feeling is, among the majority of people I'm around anyway, that the past 8 years, and sometimes the past 16 years, that our decisions have sucked. People who voted for McCain and Obama both, by and large, wanted different policy. We as a nation are trying to move on from our mistakes.
I'm 19, when Bush was first elected, I was 11, his second election I was 15. It really is painful to have people accusing my country because of its past, very regrettable decisions. It's a lot like accusing the German population after WWII, or the British population after the Falklands. Many Americans did have a role in the current crisis, but many did not. As an American, who's trying to enter into the workforce, the economic crisis hurts; all because a bunch of stupid sods bought houses they couldn't afford.
This Nation has acted unilaterally against non-existent threats. The current administration threatened violence toward far to many countries. I believe a majority of yanks accept that. We can't change it, and as you've said, we can only deal with the results.