I wonder sometimes, if your observation is partially tainted by an overarching paradigm in America towards a kinship towards Europe.
In my company, we have European and Japanese suppliers. And we buy more from Europe than we do from Japan. But I can tell you, that people grumble more about Japan. The labor unions even protest to corporate whenever additional work is sent to Japan. I'm not talking about the 50's or 60's or 70's or even the 80's. I'm talking about just a few years ago.
It's not so much the technical work force that are vocal but the labor unions. But even amongst the technical workforce, you can sense an angst about suppliers outside of Europe and more of a kinship towards suppliers in Europe.
Through the years, I've been in social settings or observed, where people from New Zealand, Australia, England, Germany, Italy, etc. speak about their home country with a patriotic zeal. It doesn't seem offensive to an American. It even draws further interests. But someone outside of the European setting (or descendants such as NZ and Australia) has to be more careful about how they speak about their home country (which, by the way, proves political correctness swings BOTH ways).
IMO we need to look closer at ALL those who wish to immigrate here, and hold them to a higher std than we have been.
We have enough homegrown anti-American knuckleheads to deal with, we don't need to import any more.
Don’t get me started on folks who are not offended if someone has an Italian flag sticker on their car, or an Irish flag handing from their house, yet freaks if they see a Puerto Rican or Mexican flag.