Which, if you're an American, is in error. Because he is an American citizen.
Do you make a habit of identifying people by another country's citizenship standards, ignoring our own?
What Trump said was a fact. A Mexican citizen is a Mexican. That fact was the pertinent one re Trump’s treatment by the LaRaza judge.
But I have a suggestion. Since it was JR, site owner, who posted the thread about Curiel’s Mexican citizenship, why don’t you take it up with him? Tell him you’re offended that Trump referred to a Mexican citizen as a Mexican. Tell JR Trump made a mistake. And you can even add that you’re having trouble getting posters to heed your superior wisdom: that Mexican citizens should not be referred to as Mexicans.
Maybe the Fourth can include a bolt of lightning. We shall see.