So this is a play on words?
If someone hates blacks or is a racist can they render an objective verdict.
Yes they can be objective, but if they have a history of racism, it'll be hard to prove to a judge that they are in fact objective.
Also just read up on this Brandon Mitchell fellow. From his history of wearing Floyd-inspired clothing, to attending Floyd protests and lying about it, to pushing court as a venue to spark "change", he does not seem to be objective at all.