In the Federal jury that later convicted Koon and Powell of Federal civil rights violations, there were likewise 9 of 12 white jurors.
Modern American jurors don't inherently judge on race. For another example, the jury that convicted congressman Mel Reynolds on all charges was half black:
https://www.nytimes.com/1995/08/23/us/congressman-convicted-...
This isn't a partisan issue, the color of your tie does not wash your hands of blame here.
The Dem party's marketing dept should all get raises, though. For some reason you seem to believe that having a black president who did absolutely nothing for black people was better for black people than Trump. When it comes to policy or enforcement changes, this could not be further from the truth.