I came of age in the 60s. As a child growing up in a Southern State I remember segregation as there being restrooms and drinking fountains marked 'colored' and 'white'. My high school got its 1st black students when I was a senior. I saw the first Beatles performance on the Ed Sullivan show while in High School, saw the 1st Moon landing on TV in a Navy barracks. I remember how I disliked Nixon when he was running for President against Eugene McCarthy, but McCarthy was just impossibly 'leftist' for me. I thought Ed Muskie of Maine should have been the Democratic Candidate but somehow, the Republicans sabotaged Muskie's campaign. Then the Watergate Scandal came along and Nixon was forced to resign.
None of that compares to what's happening now. But I think there are a collection of things that have happened to tear everything down. Social Media in general has not been the blessing we thought it would be. The old News Media for all its faults and claims of bias, was more responsible and objective than what we get from the braying, jackass amateurs posting so called news now. Manipulators in Russia, China, North Korea and probably other places are getting more and more sophisticated in planting stories and influence. Russia has actually been doing this a long time, fomenting Racial unrest as far back as the 1960s for example, as documented in a book called The Mitrokhin Archive.
I think part of the problem has just been too much success. The USA has been so successful that it's grown soft in some way. Too many people grow up unaware of some of the harsh realities of the world. They have theories about how the world should be without awareness of the practice. (See my sig for my take on theory and practice.)