“states legalizing...homosexual marriage prohibited by federal law.”
That is not nullification, and gay “marriage” is not federally illegal. The central government simply says for its purposes only marriage marriage exists. Whatever wacky couples the states want to recognize is up to them.
That being said, this will be considered racist by the MSM because...um...first of all everything they dislike is. Secondly, they’ll say, “Didn’t South Carolina nullify something way back when the later start the Civil War?” And that’ll suffice to bring forth a new battle cry of freedom.
Repeating, it’s an end run but...if it works? You and I seem to agree on your other points, except I’d like to point out there was nothing at all civil about The War Of Northern Aggression.