On Donald Sterling and 'Injustice'

Dave Zirin for The Nation, on the dark side of Sterling's exile from the NBA:

Now the NBA will never have to answer the question about why the Sterlings have been coddled for so long. Now the NBA won't have to defend why racist housing practices, demonstrable misogyny and the verbal abuse of players was ignored for so long.

Great question — if Sterling was known like this prior, why wait to act now?