That was said In Dicta and not part of the decision.
It was included in the final of “United States v. Wong Kim Ark, 169 U.S. 649 (1898)” and is a part of the story of the case. That is what counts here.
That does not mean it doesn't exist.
Ideally, I think the military should take over and a Pinochet type character should rule until America comes to its senses, but I don't see that happening.