Everybody yearns for the good ol days. Humans think Life owes them something and then when it becomes more of an adversary than an ally, they filter out the good memories from the past and focus on them. This is an escape mechanism.
Concerning blacks, when I went to the U. of I, during the early 1950s, the black population on this huge campus of over 25,000 was about 500 at the most. So all of us blacks associated and socialized with each other. We came from little towns and villages from all up and down the state of Illinois as well larger places like Chicago and Springfield. And many of my black school mates had backgrounds similar to mine. In their hometowns they were the minority where whites were the majority, and we were all able to co-exist in such environments because our small numbers made us nonthreatening. We stayed to ourselves, and created our own little communities within the dominant one. And we had all perfected our double consciousness, presenting one face for whites and one for our own folks. And in my day, Maywood's sedate little black community was the recipient of many of the things that accrued to whites, especially when it came to the schools which were top notch during this time. I kinda think these are untold stories, and are not as rare as one might think. In fact, my father who was raised on a Kansas farm, went to a one-room school house that was integrated, and he often talked about his "Tom Sawyer" way of life back in the early 1900s. I'm sure, of course, it was quite different in the Jim Crow South.
Nowadays my kids, who range in age from 45 to 58, have taken to talking about "the good old days", which they seem to measure in terms of music and styles. They look back fondly on the '70s and '80s; the R&B Soul train times with the Afros, bell bottoms and platform shoes being the rage, and the MTV days with the videos of Prince and Michael Jackson, and the Disco era of Donna Summer. And actually, those 2 decades were kind of a pleasant interlude.There was no major war, the economy was fairly stable, drugs had not yet reached epidemics portions in their environment and - best of all there was no social media to addict and stultify young folks.
IMO, malcontents make up a large portion of Donald Trump's followers. They don't like how Liberals expect them to be tolerant of those who are different, They don't like what they perceive as interference by big Government in their lives, they don't like America being soft on terrorism but they love their guns and embrace their religious hypocrisy. Above all, they don't like a nigger running the country or the prospects of a "cunt" replacing him. When they say make America great again, they mean reaffirming their right to be assholes.