I get why the president of the NAACP's L.A. branch had to resign: the man sold the NAACP's credibility. But why return the donations?
To burnish Sterling's reputation in return for his cash, that would have been repellent (and at this point, incendiary). However, the NAACP is dedicated to fighting the very racism that all but exudes from Sterling's pores. What could have been more fitting than to take his money and put it to a use that would gall him?