When the Yankees move to the South and behave, you can't tell them from everyone else.
It's the same everywhere.
Once in Paris--in the Ritz Bar--I watched a loud, obnoxious American woman, complaining about...well, it doesn't matter... But I kinda wanted to crawl under the table.
Then I realized that she had nothing to do with me--and climbed back out from under the table.
As I chatted with the waiter, in a soft voice--in French--with a good accent, if I do say so myself--we agreed that the Americans who stand out are the only ones you notice. Everybody else just blends in, and you don't know they're there. Everybody thinks that the loud, obnoxious Americans are the only Americans, because the others are invisible.
Outstanding point. It sounds like you represented your country well. Thank you. It makes life easier for those who follow you.