What's absolutely obvious to you may not be to the Supreme Court, that's why I was looking for case law. The interpretation I just read stated the "the full jurisdiction" qualifier was to used to exclude American Indians as they were under tribal law. I doubt that allowed them to commit crimes without consequence.
My hunch is the anchor baby concept is going to be challenged in court in the not to distant future. The makeup of today's court makes me think it might not be as cut and dried as it appears.
While I freely admit that it is not above SCOTUS to act creatively to reach whatever conclusion they want it's not like case law would stop them either. I mean look at the Janus case.
I would suggest reading the piece I linked before as it pretty conclusively destroys every possible argument for birthright citizenship not including all aliens.
Here's a few quotes from the people who wrote the amendment:
The proposition before us … relates simply in that respect to the children begotten of Chinese parents in California, and it is proposed to declare that they shall be citizens. … I am in favor of doing so. … We are entirely ready to accept the provision proposed in this constitutional amendment, that the children born here of Mongolian parents shall be declared by the Constitution of the United States to be entitled to civil rights and to equal protection before the law with others.
As for the 'full jurisdiction' argument it's a nonstarter as it doesn't apply here. Specifically, tribal members in Indian lands were NOT subject to most US laws, having an individually sovereign status within US borders, meaning they were not under the jurisdiction of the United States. This is in marked contrast to aliens who visit the US who are under the full jurisdiction of US law
at all times. So yes, I can provide you with plenty of circumstances where members of Indian tribes could engage in acts that would violate US law within the boundaries of the US where they would not be subject to US law. In order for your argument to have merit for the children of aliens you need to be able to show a single, solitary case where that is true for them. There isn't one. (again, outside of children of diplomats where this already doesn't apply)
In all fairness though I should have read my own article more carefully as it specifically cites judicial precedent where birthright citizenship DOES extend to all children regardless of the immigration status of their parents in Plyler v. Doe:
https://en.wikipedia.org/wiki/Plyler_v._Doe
Texas officials had argued that illegal aliens were not "within the jurisdiction" of the state and thus could not claim protections under the Fourteenth Amendment. The court majority rejected this claim, finding instead that "no plausible distinction with respect to Fourteenth Amendment 'jurisdiction' can be drawn between resident immigrants whose entry into the United States was lawful, and resident immigrants whose entry was unlawful."
That should be the final nail in the coffin, no?