The author of this piece doesn't state their identification and normally I don't think they'd have to. Since someone else is insulted by a term that was used to define them, it seems to me that someone of a differing demographic should not be the one to dismiss the insult.
i.e. a gay man is insulted by being called a ->-bleeped-<-. i, a straight man say, "it wasn't meant to be offensive so it wasn't." not my place.