I don't know how widespread the opinion among New York police officers, but saying that Mayor De Blasio has blood on his hands for the tragic murder of two NYPD officers is neither helpful to anyone, nor correct.
It's certain that any time any group is under pressure, they tend to "circle the wagons" and lash out. The NYPD is mourning and also offended by Mayor De Blasio's previous statements of lukewarm support and his plans to increase training for the NYPD in wake of the death of Eric Garner.
What's wrong with more training? I don't how anyone can objectively and rationally watch the videotaped take down of Eric Garner and his accidental death due to the choke hold applied by a police officer AND NOT believe that the situation could have been handled better. More patience and wisdom -- such as might come from better training -- would probably mean that Eric Garner would be alive and in police custody today with neither the suspect nor law enforcement suffering injury.
Support for the brave men and women in law enforcement does not mean blindly unquestioning their policies, techniques, and training level. Better policing IS safer policing.
The Nation's hearts go out to the families of the fallen officers and the entire NYPD who feel like they are under attack but inflammatory rhetoric and blind, misplaced, unquestioning support have no place in the discussion whether you are supporting the police or minorities.