Good luck, BEG. I'm not going to say that there isn't plenty of discrimination at pretty much everyone flying around in this world, but I've noticed over the years that it's more PC to insult Americans.
It was especially bad when I lived in Germany ten years ago: it was like it had gotten to be old hat to roll your eyes at everything America did, and since it was a moral failing of my country I was expected to do penance by listening to their every rant... whether my host family, the school teachers, or my friends, I got to hear all about how we think we're the world's police, our egos are so fat with world domination, we can't name a single other country, etc. The worst of it was when some kid at school (maybe twelve or thirteen years old?) threw a snowball at me and yelled "f***ing American!" In English, no less.
Grr. I just noticed I'm still a little bitter about that.
I doubt that was meant to be derrogatory. I sometimes say to my husband that "you crazy English people say ----- when it should be -----." Or making jokes about how English people drive on the "wrong side" of the road, when really, it's just the other side.
I thought about this, too, but then I realized that that's only funny or cute if you're talking to an English person. It's not quite as endearing if you're addressing a roomful of people who are from the same culture. For instance, my Finnish professor from undergrad would always pretend to talk up Finnish people and make fun of Americans, and it was hilarious. But if we had all been Finnish... it would have just been weird.