I would lie if I said I wasn't baiting a little bit, but man, see? Cuts both ways.
Die Hard is extremely obvious. I mean, the whole movie is about this guy finding that his wife suddenly has a job, makes more money than he does and may be attractive to smarter, richer people, but then fate conspires to make his blue collar streetsmarts and prepper attitudes having him save the day for the foppish yuppies. The entire movie ends when they throw the eurotrash rich thief out of a building by literally unshackling Holly from the bonus gift her company job gave her, then wrapping her up in a comfort blanket and taking her home. The movie also finds time to clearly establish that all public servants are idiots except for street level cops.
Back to the Future is subtler, but also pretty straightforward. Kid thinks life with middle class parents in the 80s sucks, goes back to the 50s, which turn out to be as ideal as expected but also somehow cooler in a very 80s kind of way, teaches his dad self-assertion and comes back to the future to find he's now upper class and has a 4x4. It's a lot less hardcore, but the reagonomics are running underneath the whole thing. I'd take that it's accidental, because the same team went much more leftward in Roger Rabbit, so I think it's just that a lot of the cultural white noise of the mid-80s is baked into the assumptions. And the nostalgia is a massive driving force of conservatism anyway. BTTF is idolizing this "fifteighties" imagery the same way Grease was to suggest there is a perfect past to return to. Kind of in the way Stranger Things and a bunch of other stuff does to the 80s.
That's maybe the most fun part of breaking down BTTF. The iconic slivers of the film set in the 80s are supposed to show it being run down, realistic and disappointingly drab by comparison.
Also, Lybian terrorists stealing plutonium but being so incompetent they get tricked by Doc and defeated by Marty. That's a very time-specific one, like Rambo praising the Taliban.