Roberto Bolaño said this quote

I'm American. Why didn't I say I was African American? Because I'm in a foreign country? But can I really consider myself to be in a foreign country when I could go walking back to my own country right now if I wanted, and it wouldn't even take very long? Does this mean that in some places I'm American and in some places I'm African American and in other places, by logical extension, I'm nobody?