The whole “black culture” grew out of the democrats need for division. Prior to that, blacks and whites lived very much the same. Sure there has always been racism but blacks and whites could spot it and avoid going where they weren’t welcome.
Forced desegregation has been really bad for America. That’s not to say that I think segregation is good only that forcing contact creates tension.
Like if you were black and traveling anywhere in the South for any reason and you wanted lunch or a glass of water and you had to go look for the ons Negro establishment???
The original question was about race relations and how safe the cities were before LBJ. That really was the dividing time line. 1967-1968 saw urban riots all over the US. After that, whites decided the cities were not safe and voted with their feet.
When you think about it, this is a sea change of historic proportions in a very, very short time. I could name several cities in Michigan alone (Detroit, Flint, Pontiac, Saginaw, Lansing, Muskegon) that have lost population and jobs and and have become, basically, rat holes since LBJ.