they don’t mean they want to restore the postwar tax rate and new deal social programs.

I mean, they might. Tucker's been feeding the American Strasserites after midnight and they've been multiplying. Very possible that they really do yearn for the Jim Crow Era, both because of the social conservatism AND the economic liberalism.

It's also very possible that they are nostalgic for a time when America was the country that Won The Big World War rather than for losing a bunch of little ones.