Name changed. I'll keep it brief and this is really more a WWYD than an AIBU, but I guess they overlap. DH is American. We live in the UK. Our two DCs have always grown up understanding that they are both British and American. We keep reasonably good links with our huge family over there, celebrate American holidays and they pick up American vocabulary and phrases from their father. All in all, both DCs consider themselves to be both. They have dual nationality, so this is the reality of the situation.
Throughout primary school, my older DD has had occasional anti-American remarks made to her by some of the other kids (e.g "I hate Americans" or "Americans are stupid"), but school never seem to do anything about it when I bring it up. Now, a boy in her class has taken to regularly mocking her, putting on a fake American accent, and saying, "Hi, my name's XXX. I'm American and I'm stupid and dumb." Again, her teacher has told her to just ignore it, but both she and my DH are pretty annoyed, as am I.
Why do some people think it's ok to make racist remarks against Americans? I don't think it's ok, not one tiny bit. But I'm not sure whether it's worth taking things further with the school by speaking to the headteacher. WWYD please?