Excellent analysis, as always.
You answer the question as to why Dems like Biden/Obama simply refuse to face or accept the fact that "compromise" and/or "bipartisanship" are just words without real meaning. They continue to appeal to right-wing racists knowing that they are racists, and refusing to embrace their own "base." When they lose everything in November (and when the Republicans impeach Biden in January), look for Democrats to blame their black base.
Again, well done. Thanks for providing the numbers and stats, especially.