Actually, Biden is mistaken. Dr. King's assassination replaced Christian humanism as the guiding light of the civil rights movement with "black liberation", the baleful consequence of which has been the failure to fulfill Dr. King's vision and the continued viability of white supremacy as an attitude and ideology. As the loathsome, but perceptive, Richard Spencer put it, the current driving ideology of the (now so-called) civil rights movement is "a photographic negative of white supremacy". It's easy to make prints from a negative. Had Dr. King lived, there's a chance the image would have been gone and by now we really would all be judging each other by the content of our characters, rather than the color of our skins. Had Dr. King not been assassinated, there likely would have been no rows over Michael Brown, or Trayvon Martin (heck, he might have stayed in school and not been a thug) or George Floyd (who may not have even had an untoward encounter with police).
