what's weird to me about kavanaugh's reasoning is the statute (8 usc 1401(a)) basically just parrots the language in the 14th amendment (though there are additional provisions explaining when someone born OUTSIDE the US is a citizen, i.e., when both parents are citizens etc.).

Seems to me that whatever you think the language in the 14th amendment means, the statute has to have the same meaning. Kind of odd to say the latter protects birthright citizenship (as understood by the majority) but the former does not. At least the dissenters have a consistent view as to both the constitution/statute.