IIRC, the original Star Trek was the first TV show to have a kiss between an interracial couple, and was absolutely hated by right-wingers because of it. That, and plenty of other socialist themes like black people having equal status and respect as white people.

Other good ones have been posted, but I'd add the Starship Troopers movie to the list and by extension the game Helldivers 2 which parodies the same fascist regime disguised by democratic jingoism theme as the movie. I believe the original Starship Troopers book was 100% serious with its support for a fascist regime, however.