They’re attempting to control society by definitions. Can’t have ‘same sex marriage’ if marriage is DEFINED as man-woman-having-babies.
That way, someone cannot claim to be a husband or wife and enjoy the same legal rights and benefits that REAL wives and husbands enjoy.
Family has never MEANT only Leave It To Beaver structures, but these people always understood it that way. Telling them the world outside their head doesn’t match makes them fearful. God only knows where this could lead.
They’re frightened that they’ll lose privilegs, maybe be treated like they want homosexuals treated.
Like that Jan 6 rioter, face down as he was being cuffed, his world view was threatened and he shouted, ’You’re treating me like a black person!’
And the ‘nuclear family’ is the husband/wife/2.5 kids model that Americans have convinced themselves it the ‘basic’ model by which all others are judged. The smallest reducible organization that can be called ‘family.’
Never mind how many, many families have existed that don’t fit the TV model, they still think this is what they cherish.