I have actually experienced the 'reverse' of this. I was in the Netherlands and a police officer was giving out to me for being an American.
Well, he was giving out to me for something different at the start, but it eventually progressed to racism. Or, I guess, jingoism/nationalist? in this case. In Europe, any form of discrimination is usually referred to as racism even if it is nationalism or jingoism etc. Because who wants to say 'nationalist based discrimination' every time, I guess.
In any case, humans are super good at being racist. Go figure. But this woman is super, super good with just a few drinks in her. I wonder how long that outburst had been simmering inside her. I also wonder how much of it is simply redirected racism she herself had experienced. It can be an ugly cycle, I bet.
I also wonder if, like me in the example above, those Indians were simply visiting. So, you go to America, have a conversation in a parking lot, and someone who identifies as Mexican and American attacks you for not being American enough. Well, now we know why it's a story. That's some crazy shizzle right there.