This aspect is one of the reasons I'm very uncomfortable with all the classification of people into races. There's always a hierarchy implied, even inside the white category, a ranking of more or less white, questionably or unquestionably white etc. It's not the world I want, I don't want to internalize these (unspoken) classifications of people.

Is the US the world's only country?

Throughout the history of the world, who counts as XYZ has been redefined many times to suit the political goals of the people at the time.

I recall when we stopped being Yugoslavian, and started shooting at each other, as Serbs or Croats. The Russian guy sitting next me married a Ukrainian woman a decade ago. Recently Russians and Ukrainians started shooting at each other. There's a great deal to read on this topic if you're genuinely interested.

“The thing that hath been, it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun.”

Like WTF? Rude. This is exactly the kind of behaviour ChillBill is talking about. Racism is a big deal. You can't just casually be throwing it in anywhere without backing up what you're saying.

What exactly did ChillBill say that borders on racism? Why does that step on the border if racism? Why are you that sure that you'd warn him/her/them?

Them having been on the other side of the saddle, I'd bet they're familiar. How about simply listening to what they have to say without instruction, seeing their perspective and taking it in?