Mayor de Blasio delivered another blow to New York’s Finest on Wednesday when he reappointed a Brooklyn judge who freed without bail two men who threatened cops just days after the Bed-Stuy double police assassination.

The stunning decision came even as one of the suspects — a gang member charged with posting police death threats online — skipped out on a court date and had a warrant out for his arrest, sources said.

Brooklyn Criminal Court Judge Laura Johnson had faced a midnight expiration of her term. She was appointed by Mayor Mike Bloomberg in January 2013.

Her one-year, interim reappointment by de Blasio outraged law-enforcement officials a day after he met with the heads of five police unions to heal his fractured relationship with cops.

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