I think the argument was that if your parents are not naturalized citizens, then that means they're not 'subject to the jurisdiction thereof'. So like, if the parents 'owe allegiance' to their previous country then it makes the kid a citizen of the parents' original country, and not the U.S.
But it's all actually bullshit to try and justify not wanting brown people to be U.S. Citizens tbh.
I work 988 and other crisis lines. Whenever people ask me "How do we raise awareness? How do we reduce suicide?"
I answer with "socialized Healthcare, strong worker's rights, defund police and increase funding for home assistance and mobile crisis, " and on and on and on.