The mayor is probably giving high-five approval of this march.
The mayor is a comrade of these vile protestors.
The power brokers in New York City don't really give a sh!t about two cops killed by a quasi-humanoid mutant in Brooklyn. But when these protesters disrupt commerce in the high-rent areas of Manhattan, then all bets are off.
Notice how quickly and thoroughly the NYPD shut down the protesters who tried to disrupt the Macy's Thanksgiving Day Parade a few weeks ago.