That era must seem like an even more distant past to those starting to understand the news now, so I can see why they want to blame Hillary Clinton or Donald Trump for the problems we face today. But looking back, what I see is; enough of the people who have the power and the money will find and support people in doing horrible things to good people so they can keep their power. That power might be young or old and comes in all colors. In America, it's mostly white now because that color divide has been the one that has worked to maintain the power structure.
Here is a brief highlight of the timeline of how we got here. I believe, if you spend about 10 hours or so looking up these names and events, you'll have a good understanding of what's happening in the streets.
1948, Strom Thurmond ran for President. He was openly racist. This was normal. He was a senator for 48 years.
60 million people voted for the guy who said Mexico was full of bad hombres. Reasonable conversation about immigration reform became no only difficult but impossible. Policies of keeping people from certain countries out of America were floated and struck down by Justices. The problem of how to handle the children of people crossing our borders illegally was solved by just putting them in cages and building more cages and keeping them in those cages for longer than any had done President ever.