https://www.federalreserve.gov/econres/notes/feds-notes/disp...
Imagine you and your coworkers are planning to go out to eat for lunch. One coworker says that you should go to a steakhouse. You say "No, coworker X probably won't be able to afford that because he's black. We should go somewhere cheaper instead." Is that racist? I think so, and I think it's the same logic being used here.
This reminds me of when people use the murder of Emmett Till to argue how evil white people are. He was furtively killed in 1955 - 66 years ago.
When the best latest examples are this old it kind of cuts against the whole accusation. It's like saying Joe is such a jerk, look, he kicked a dog 50 years ago.
https://news.berkeley.edu/2020/09/10/why-bay-area-neighborho...
The rest of your post doesn't merit a response as it has nothing to do with what I wrote.
Lots of examples:
-Vietnamese boat people arrived in the mid-70's with nothing. They quickly became successful and still are.
-Jews lost so much in WW2, including half their families. They quickly became successful after the war and still are. They didn't sit around in ghettos forever.
-Nigerian immigrants to America often come with little wealth and yet do better than American whites economically.
-Iranian immigrants arrived after the 1979 revolution with nothing. Now they do very well - better than average whites.
If "the long now" was real, none of these would be possible and all immigrant groups who arrived poor in the last 50 years would still be poor.
This is actually a really important thing to learn because it's critical in your mental model of the world. You think some event 50+ years ago will keep families in poverty for literal multiple generations - it's not true at all. Families rise and fall much much quicker than this. If someone is in poverty that long (in the context of a somewhat free society) it is because of internal issues, not circumstances.
Society at large treats slave-descended blacks no worse than African-immigrant blacks (or other nonwhite immigrants); the difference in outcomes comes from their own internal issues. The sooner we can acknowledge the actual source the problem the sooner we can make progress on solving it.