If he said anything, it would be more like “Are you Israeli?” I don’t understand how in this mad, bad world it is suddenly (oh, that hated word!) “racist” to ask where someone is from!
It is racist because the perpetually offended twitter mob says it is.
I used "Jewish" deliberately to emphasize the fact that Trump was accusing the kid of being a traitor who puts Korean interests over American ones, despite the fact that he merely stated the simple fact that Korea pays almost a billion dollars a year towards the cost of the GI's stationed on the peninsula. The issue isn't that he's racist, but that his first resort in response to a query about his errors of fact is to launch a personal attack on the person asking the question. This isn't the first time Trump has said this - he previously stated his erroneous opinion as fact in 2011.