Police Commissioner Dermot Shea was right to condemn violent anti-cop rhetoric on Sunday — and also right on Monday when he slammed one cop’s violent rhetoric about Mayor Bill de Blasio.

As we noted Monday: Violent rhetoric begets violence, such as the weekend attacks that wounded two members of the NYPD.

Sunday’s tweet from the Sergeants Benevolent Association: “Mayor de Blasio, the members of the NYPD are declaring war on you!”

“One hundred percent, that’s inappropriate,” Shea told reporters as one of the wounded lawmen left Lincoln Hospital. “This is a time that we need to come together, first and foremost.”

After all, the SBA was tweeting back at this from de Blasio: “This was a premeditated assassination attempt against New York’s Finest. It was also an attack on ALL New Yorkers and everything we believe in. This MUST be a city where everyone can live in peace and respect. This individual attempted to destroy that. We will not let him win.”

We’ve been plenty tough on the mayor, including on policing issues. But he was spot-on there, and any suggestion that he be the target of violence is way, way out of bounds.

Especially now, when New York needs everyone to take the heat down, not up.