There are openly racist white supremacists and that's how it should be - they are allowed to voice their opinions (thanks to free speech). They aren't a significant minority and they know their day has passed. Best to let such movements die out.
Actor Morgan Freeman said, in answer to a question about how to get rid of racism, “Stop talking about it.”
https://www.snopes.com/fact-check/morgan-freeman-black-histo...
It may be too handy and too easy to use racism as a political weapon for some to let go of. For others it may be a crutch they never needed yet perhaps are unwilling to lay down.
Talking to some younger liberals today you'd thing that they actually lived and personally experienced the US's periods of racial turmoil (all the way back to the Civil War and to the establishment of the original 13 colonies). Their outrage is fresh and full-blown. But that suffering was done by their ancestors (the black ones, in particular) not by them. And remember that the Civil War alone in the United States cost many, many white lives: 698,000 by one estimate - most of whom were white.