Just a small response to the comment about US citizens being ignorant of other cultures and what people see as American nationalistic self-regard.
I think other cultures have a greater and distorted idea of US culture than we do of theirs is because, for the last half century at least, we have exported reports on our culture through entertainment. Ideas, usually grossly distorted and often just plain wrong, about our culture have permeated as far into foreign countries as I've ever been. The fact that Hollywood and the US market is a desirable target for entertainers from any country who make it big is not our fault; it just is.
American citizens travel overseas less than others, perhaps, is due to three obvious factors - a huge diversity of culture and geography right here in the US, the enormous physical and economic barriers of the Atlantic or Pacific and the language barriers. Yes, I agree, we would be better citizens of the world if we got out more but it just isn't going to happen that easily.
In regards national pride, I don't think it is necessarily true that Americans have greater feelings about their own country than many others but it is just expressed more openly and with a slightly different slant than others. I can speak only from knowing citizens of the UK, Western Europe and Russia well enough to talk about their national feelings and each of them have very strong positive feelings towards their homeland.
With respect to living in the US, much of what people lump under freedom is relief from artificial class and cultural barriers that exist in many countries. I think what people see in the US is a chance to make something of themselves without the false anchor of social constructs. The only other country that is both a democracy and large geographically and in population is India.
The US has very little history compared to just about anyone and it has grown by jamming in malcontents from all over the world who wanted to take a chance to make their lives better under a new set of rules.
A country that is so heterogeneous in culture and geographically large is virtually ungovernable and almost certain to be the lumbering giant that it is.
New York City alone has about the same number of people as Sweden and more than Norway, Finland or Denmark.
Population density goes from 26000 people square miles in NYC down to 4 or 5 in Colorado.
Yes, it is totally sometimes a PITA to live here, putting up with radicals and reactionaries and morons and sometimes a silly labyrinth of laws, and I dream about living as a expatriate someplace where I can pick all the conditions that are right for me and carry with me only the things that I want.