I would hope he wants the "best guy" regardless of race....
I'm sure he does but superficial things like race have an effect on recruiting whether you like it or not. It affects what we do at my job . . . if we don't have a reasonably "colorful" faculty composition, there will be students who decline to come (or stay) because there's a subconscious comfort that comes from being around people like you and having mentors that you perceive as having gone through the same struggles as you.
So in the end I think Jones wants the best staff available but having several black assistants makes it a better staff than it would be otherwise.