"... not exactly a shortage of racism is America ..."  In a country of 320 million people, we will certainly find a few jerks of almost any description.

"... white nationalists marching in the streets ..."  Not my cup of tea, and I don't see any % in running around, trying to be deliberately offensive.  But should we be upset by this any more than we might be by, say, a march of the Nation of Islam or the Black Panthers?  What's the difference??

"... lived his life as a black man in in white dominated society ..."   So have many others, who have surmounted every obstacle and gone on to become millionaires (billionaires, in a couple cases), or Olympic gold medalists, Chairman of the Joint Chiefs, Supreme Court justices, governors, senators, big-city mayors, Secretaries of State, best-selling authors, Ph.D. scientists... even President of the United States!  Minority status need be no impediment to achieving excellence  -_if you have the chops_.  :-/

And the borders have never ...