Blame New York’s progressive leaders for the horrific filmed murder of a 14-year-old boy on a Bronx playground this week.

Late Tuesday, a mob of teens jumped ninth-grader Angel Mendoza at the Williamsbridge Oval Playground — pistol-whipping, beating and stabbing him to death while they recorded the stomach-churning ordeal on a cellphone camera.

Angel was hanging out with a boy who’d been involved in a earlier fight with the group, and the sadistic teens killed him just for being in the wrong place at the wrong time.

His stomach-churning death is an especially brutal one, but far from unique.

These tales of teen-on-teen violence have grown all too common, spurred on by a slew of braindead lefty policies that encourage youngsters to break the law.

The Raise the Age law, which moved

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