The NYPD’s Hate Crime Task Force is hunting for a middle-aged white man who called a 15-year-old Muslim girl a “terrorist” and threatened to kill her aboard a crowded city bus in Queens, law enforcement sources told The Post.

The 5-foot-7 suspect became angry at Aya Mohammad when her bag brushed up against him as they were riding on the Q88 bus at Kissena Boulevard and Horace Harding Expressway in Kew Gardens Hills during the Monday morning rush, the sources said.

He started hurling profanities at Mohammad, screaming, “F— you! F— your people! You Muslim! You’re a terrorist,” according to sources.

Mohammad, who was clad in traditional Muslim garb, allegedly tried to calm him down by pointing out that it was a bumpy ride and the bus was crowded.

But the thug only became more aggressive, pushing the teen and repeatedly spitting on her, sources said.

Fed up, Mohammad fired back, calling the hate monger a “piece of sh–,” sources said.

But that only prompted him to clench his fist and sneer, “I’m not scared to hit you with my fist. I will kill you,” sources said.

Mohammad was so terrified that she couldn’t dial her father’s phone number when she tried to call him, sources said.

The suspect ran off the bus when it stopped on Kissena Boulevard.