The original understanding of NBC is debatable. If Ramaswamy was born on U.S. soil and his parents were here legally it’s possible he is an NBC.
Any debate - whether over understanding or definition - will have to address the purpose of including the class of ordinary "citizen" in the sentence that introduces NBC.
The language used provides those born prior to the date of Adoption, "citizens", could serve as president. However, those born on or after the date of Adoption were required to be NBC.
What possibly could warrant use of the two classes, or otherwise separate the two classes, other than parents who would be citizens as of the date of Adoption?
I predict that any court that faces the issue squarely will incorporate such reasoning in its opinion.
Meanwhile, those who would remake our nation will continue to shame any who insist on NBC just as they shame critics of the recent presidential election.