If you are grateful for small things, it is a good sign that even constant critics of the police are denouncing the murder of NYPD cop Brian Moore. No less than President Obama, Mayor Bill de Blasio and Al Sharpton have expressed outrage and offered condolences.

Brian Moore was only 25. There can be no justice for him, and the only peace he will know is the peace of the grave. In death, he is called a hero by some of the same people who, while he was alive, saw him only as a villain.

Their remarks are welcome, with Sharpton calling the murder an “unpardonable crime.” His comments reinforce the old-fashioned idea that attacking law enforcement is out of bounds, always and everywhere.

Brian Moore was only 25. There can be no justice for him, and the only peace he will know is the peace of the grave. In death, he is called a hero by some of the same people who, while he was alive, saw him only as a villain.

Unfortunately, however, the progressive ringleaders could also have a less noble motive for joining the common-sense chorus. Maybe they concluded that dead cops are bad for business.

In their day jobs, all three routinely make excuses for those who break the law and blast cops first and get the facts later. Each offered encouragement to the law-breaking rabble known as Occupy Wall Street and expressed varying degrees of support for anti-police protesters in New York, Baltimore and Ferguson, Mo., even as they criticized arsonists and looters.

The effort to separate good protesters from bad rioters is doomed to fail because too many people in both groups are motivated by hatred for cops. Fanning that flame while expecting to control the damage is mission impossible, even for Sharpton and the skilled community organizers in the White House and City Hall.

Recall that some anti-police protesters in New York last December chanted, “What do we want? Dead cops” a week before Officers Wenjian Liu and Rafael Ramos were assassinated. Only then did de Blasio stop praising the protesters and letting them shut down highways and invade stores with impunity.

To continue reading Michael Goodwin's column in the New York Post, click here.

Michael Goodwin is a Fox News contributor and New York Post columnist.