Thanks for your gracious reply.
It's not really a matter of semantics, though. It's a matter of identity. Racial minorities have the right to self-identify.
I have a friend who has red hair & green eyes & she's just as Cherokee as her brown-eyed, black-haired sister.
We get patients in the ED from southern Mexico who speak no English or Spanish. They're not full-bloods, but it would be pretty hard to argue that they're not Indian when the only language they speak is Mayan...