I’ve never heard of this guy but what I see is old, rich guy - has young, hot, likely money-grubbing girlfriend, who ironically also happens to be part black and hispanic.
He doesn’t like her hanging out with the brothers in public.
In my view, he knows her nature, and is afraid of being cuckholded.
That is the source of his fears - and his comments.
Sterling regularly takes out full page ads in the L.A. Times promoting his acts of philanthropy and real estate projects.