"traditional marriage" was literally a property contract. its still a contract, which is the whole reason government is involved at all - one of the purposes of government is the enforcement of contracts between two parties, so you don't hafta go out breaking kneecaps when someone doesn't keep their word
That's pretty ableist. I thought you're better than that.. :/
I mean I get the joke, but disabled people born from incest can't anything for it and therefore shouldn't be discrimated against.