It's funny you mention this, I was thinking the same thing. However, what YOU seem to be saying is that when you ask the guy what ethnicity he is (let's say he is dominican), you tell him that he is not dominican, but african american.
You are, of course, free to judge and assume what ethnicity he is. But how does it make you look when you judge someone based on first appearance?
You shouldn't have looked. You should keep your eyes closed at all times lest you accidentally see someone and jump to a conclusion based on what you are seeing.
The rest of us don't seem to have a problem with preconceived notions.....The rest of us don't seem to be so judgmental.
"Why don't you call upon your God to strike me? Oh, I forgot it's because he's fake like Thor, so bite me" -Greydon Square