The rift between de Blasio and much of the rank and file has grown considerably in recent weeks, and the leaders of the police union have blamed the mayor for fostering an anti-NYPD atmosphere they believe contributed to the ambush slayings of two officers earlier this month.
The tensions stem from a grand jury's decision not to indict a white NYPD police officer in the chokehold death of a black man, Eric Garner, who was unarmed when police were trying to arrest him for allegedly selling untaxed cigarettes.
De Blasio has spoken about cautioning his own son, who is half-black, about contact with police, and he permitted anti-NYPD protesters to march freely. When the two officers were gunned down Dec. 20 by a man who cited Garner as one of his motivations for violence, the police unions said de Blasio had "blood on his hands" for fostering an atmosphere of anger toward police.
The 884 new police officers sat stoically in their seats when de Blasio was introduced to speak. But audible boos could be heard from some in the crowd in the seats reserved for the cadets' family and friends.
About a dozen or so people in the stands stood with their backs turned to de Blasio, emulating the searing pose of disrespect that hundreds of officers struck at Officer Rafael Ramos' funeral on Saturday.
"It takes a special kind of person to put their lives on the line for others to stare down the danger, he said. He then continued: "You will confront all the problems that plague our society - problems that you didn't create.
