According to our Immigration and Naturalization Service, about 1,350,000 people legally migrated from Europe between 1991 and 2000, so it's not like there aren't a lot of pro-American types there. (Unless they've all left. :) )
I wonder if the sentiments you describe are more or less pronounced among young people.
The older people know the US has done a lot to liberate them from the nazis. That feeling has gone with the new generations.