SAN DIEGO — Are we enlightened now? Does anyone believe that Americans are better off now than they were before they heard the peculiar racial musings of Donald T. Sterling, the 80-year-old married billionaire who didn’t want his 31-year-old girlfriend flaunting her relationships with African-Americans? Are we more sensitized to issues of race now that the owner of the Los Angeles Clippers may be forced to sell his basketball team — a transaction that could bring him an estimated $575 million for a franchise he bought in 1981 for a mere $12 million?