Unions representing Suffolk County cops on Friday joined police unions in New York City, Nassau County, Yonkers and elsewhere around the country to support a boycott of Quentin Tarantino’s films.

They’re furious that the director called cops “murderers” at a rally in Washington Square Park days after NYPD Officer Randolph Holder was killed in the line of duty.

The Suffolk unions issued a statement saying Tarantino films “are riddled with over-the-top and gratuitous violence. Violence that he really knows nothing about, sheltered in his protected world.”