Most americans living in europe get along very well with the people. People generally love americans as long as they are not rednecks. Scandinavians are in general so liberal that one doesn't have any problems at all - except for that tendency to being so fucking liberal that it comes across as being quite conservative. Hard to explain, but you will understand it once you live there.
Opinions you might want to culture as an adopted norwegian:
1. Fishing is great. The bigger the fish, the better. And no, whales are no mammals.
2. Slaughtering cute baby seals is an old tradition and therefore good.
3. It is cool to have a king as long as you don't notice him.
4. Fjords aren't cliffs. In fact, there is no connection at all, except that both lie close to the sea and consist mainly of rock.
5. Burn a church now and then, it is considered a good custom nowadays.