This was discussed a bit on one of the FNC shows - the guy yelling at the driver IS a cop - a detective, working with NYPD's Homeland Security division.
They made comments that this is just ONE bad cop - who has been removed from duty - but he was defended by at least two other NYPD cops; IIRC one was a spokesman for NYPD, the other may have been a union rep. (So . . . I'd say there are at least THREE bad NYPD cops involved with the story, if not the incident itself.)
Oh, and an FNC commentator - either a current or former NYPD cop himself - said the detective
wasn't screaming at the cabbie, he was just
talking loudly.