He has not authorized police riots against the protesters.

There hasn't been enough pepper-spray, mass arrest, billy-clubbing, curb-stomping, use of ear-piercing Pentagon crowd-dispersal weapons, etc. Not that there hasn't been some of the above, just slightly less than under Bloomberg. The openly fascist leadership (and apparent majority) of the NYPD, like Lynch, have this idea that Bloomberg or Giuliani would have allowed them to do a lot more stomping on the protesters, whom they see as lawless anarchist cop-hating criminal dangerous un-American foreign sub-human etc. To them, anything less than a heartily-endorsed police state and utter demonization of the protests is capitulation to communism. Long before the protests got big, De Blasio actually held a press conference in which he allowed the cops to mock-arrest him -- with real handcuffs -- in showing how an obedient citizen never "resists arrest" (as if the coppers always give you a choice -- in reality, they're stomping people long before there is any chance of "resisting arrest," like with Garner). So there it was: The Mayor, cuffed, being put into a paddy wagon. Not even this symbolism is enough for the pig majority among the cops, however.

De Blasio could march out in front of the cops swinging the lead billy club and they'd still think him soft. Cops are hands-down the most fascist demographic employed in New York City. Not that most of them actually live in New York City, since they do not. They commute to a job they perceive as keeping the lid on a zoo of violent, dangerous animals. They think they're universally hated -- not quite true, though they try hard to alienate everyone they deal with -- despite the endless propaganda telling them how they are the greatest bravest most wonderful people doing the most important service in the world, etc. etc., and despite about fifteen hours of prime-time programming every week devoted to the same message, espcially about NYPD. Still they think you hate them and they hate you. And you voted for De Blasio instead of some guy who was more obviously a bootlicker.