That is neither here or there concerning how black people are treated in the world, especially in the states.
I know plenty of white people who are gung-ho for social injustice prevention, intelligent and sincere. I also know and know of plenty of malicious, disrespectful, dangerously ignorant and violent white persons.
However, put a black man and white man in a suit, with a clean shave, and the sake qualifications, and see who gets a job first. Compare a white 20ish male wearing a Hoodie with his hands in his pocket entering a department store with a black make in jeans that fit, and a nice Polo shirt. See who gets followed in the store. So many times I have been profiled wearing business casual attire, while someone else is robbing the store blind.
The problem is this thread isn't judging by a person basis; it is judging on a stereotypical basis, especially those commenting from different countries. The claptrap about black culture being gang, thug, criminal, unintelligent, scary, intimidating derelicts is exported around the world. That isnt reality, and you can tell those out of touch with reality when they retort and huff when a black person wins in a predominately "white"sport (like calling Serena Williams a man, yet the irony is Sharapova was the one doing drugs.) The huffs especially happen when a black person gets into ivy leagues (or college in general,) and overall is successful BEYOND the ways the social paradigm has set it up for blacks.
I have a physics degree from am Ivy league school with honors on thesis, I have never been to jail, no warrants, no children out of wedlock, no ex wives, I do missions, and a whole lot of other stuff... I am nowhere near the "exception" to the "rule;" minorities are much more complex, driven, and multifaceted than the Western narrative would paint them.
And, 50 years is not long at all; as said before, the people who enjoyed lynching and sending dogs to devour black people have children alive today, who are teaching their children the same hate - or teaching them to ignore everything and pretend the sins of the past don't exist.