The egregious thing to me as a lawyer is the citation to U.S. v. Wong Kim Ark.
In that case, SCOTUS held "a child born in the United States, of parents of Chinese descent, who, at the time of his birth, are subjects of the Emperor of China, but have a permanent domicile and residence in the United States, and are there carrying on business, and are not employed in any diplomatic or official capacity under the Emperor of China", automatically became a U.S. citizen at birth.
So the case they cite in support of their claim that Harris is not a U.S. citizen says EXACTLY THE OPPOSITE of what they claim it says.
Perkins v. Elg said that child born to one non-U.S. Citizen and one naturalized citizen on U.S. soil remains a U.S. Citizen even if her parents take her back to their original country and the naturalized citizen renounces his U.S. Citizen.