If I had a choice, I wouldn’t be 1/16 Native American; I would be all white, all the time.
Stick that in your pipe and smoke it, lefty!
This is an imaginary, or we might generously say, "idealized" classification. I have to recall that back in the day, a "non-white" colleague expressed, or rather indicated, surprise that Italians were considered "white". That's gotta hurt!