An Op-Ed in the Wall Street Journal discusses the NAACP's defense of segregated schools:
In 1992, the Supreme Court held in U.S. v. Fordice that racially identifiable institutions of higher education in Mississippi were a holdover from the state's Jim Crow past. The plaintiffs wanted more state funding for historically black schools, but the court turned them down, seeing the ghost of "separate but equal."
... This prompted the NAACP, in the summer of 1994, to organize a civil-rights march to save Mississippi Valley State University. In a strange turn of events, the preservation of an allegedly "segregated" institution became a black cause.