It's hard to imagine some religious organization standing against and winning a confrontation against the NYPD. The mayor and police commissioner didn't even attend the dead cop's funeral. It was a different NYPD, different NOI, and different New York back then.
I'm no fan of their dumb racial mumbo jumbo or even Islam in general but I respect what the Nation of Islam has done in terms of community and power.
In Philly the Muslims who controlled Graterford and run so much of black Philadelphia crime are not Nation of Islam anymore. They are Sunni and less disciplined and more out of control.