In a sense he’s right. When NYC’s mayor, David Dinkins, made a complete hash of his job and did not win reelection (Guiliani did), it set back black pols in NYC at least 25 years. Even the dullest New Yorker understood that black politicians were too pressured by their own interest group to govern effectively.
He was as inept dealing with the riots in i think Williamsburg. Much as Obama had continually shown hos own ineptitude in dealing with racial issues.