It’s you who have no clue.
Dems have always been the racists.
Maybe they became a little less racist in the 1960s. But still overwhelmingly they are the US political party with the history of extreme racism and hate.
If racism were a sport, the Dems would be the greatest team of all time - by far.
The problem with your theory is that the modern Republican Party has an anemic representation of black voters.
So tell me why is that?