Ah, I was confused because you used economic terms.
But I still disagree I think it's just shifted from labeling people terms for the oppressed to shut them out, to now shutting people out by labeling them an oppressor. That's the biggest shift, though some things are still very much the same, people shutting people out just for their ideologies alone has been around consistently too. At the core of the human mind we still have brains adapted to the tribal age, which is why it's so necessary to take out anyone on whatever other 'side' in our minds, that's why I think we have such a us versus them mentality.
And you're correct about the U.S.A. being in a large time of social disharmony, however, something to keep in mind though is that thinks to gigantic blow up of social media, now you can actually see what the everyday person thinks. But the way people think and behave hasn't changed, people haven't become worse at arguing or anything like that. People always love to do quick little ***** talk rather than have a constructive argument. You'll hardly ever see a street fight talked out like a constructed debate, of course it's most likely to be two people cursing each other out.
Even that aside, you kind all kinds of buzzwords from all sorts of eras, some still being used to this day.