Donald Trump has added another Republican presidential primary rival to his list of personal insult victims.

And, hey … it happens to be the only woman in the field of 17 GOP candidates.

On the receiving end of a Trump insult is Carly Fiorina. Trump decided to make fun of her physical appearance.

“Look at that face,” Trump said. “Would anyone vote for that? Can you imagine that, the face of our next president?” Trump reportedly bellowed while watching his Republican presidential rival on the news. “I mean, she’s a woman, and I’m not s’posedta say bad things, but really, folks, come on. Are we serious?”

OK, here’s the point of this brief post: If the public response follows form, Trump well might see another spike in his poll numbers. That’s how it’s gone for this guy: He says something patently nasty, the victim of the barb responds … and Trump gets a poll boost.

My question now is this: What in the world has become of American voters, most notably Republican Party primary voters who think it’s all right to be personally insulting?

Doesn’t the Golden Rule apply any longer? Do we no longer seek to treat others the way we’d insist that they treat us?

And what about the notion among some of the more conservative voters out there that the United States is a “Christian nation” comprising people of deep faith who are committed to religious principles?

Are these same folks now going to applaud Donald Trump for tossing aside “political correctness”?