Orwell wrote:
Well, the issue is that "culture" and "nation" are not exactly equivalent to "country." The US in particular has incorporated elements of a variety of cultures, and it is not really a nation-state in the traditional sense, given the level of ethnic diversity. Because of this, in the US at least we can have a clear distinction between nationalism and patriotism. Nationalism includes connotations of cultural or racial supremacism, whereas patriotism does not.
They are the same enough.
Nation: na-tion (nashn)n. 1. A relatively large group of people organized under a single, usually independent government; a country. 2. The government of a sovereign state. 3. A people who share common customs, origins, history, and frequently language; a nationality:
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Excerpted from American Heritage Talking Dictionary
Copyright © 1997 The Learning Company, Inc. All Rights Reserved.
The US is a nation, ergo nationalism is a valid feeling towards it.
As for culture, have you either ignored or forgotten my position on multiculturalism? The US is a very distinct culture, how could it not be given the statements such as "land of the free, home of the brave". The high value of freedom is a cultural trait, and the supposed high value of bravery is another cultural trait.
In any case, I don't think the ethnicity is really a massive factor in this either, particularly given that the majority grouping in the US is made up of WASPs and that group is also the most nationalistic as well.
I don't think that connotations really matter enough to be important, nor do I think arguments about the exact nature of the US are really important enough to be meaningful. There aren't enough major homogeneous nations today, but I wouldn't say that people in these nations cannot be nationalists.