A hate-fueled attacker allegedly pummeled a stranger who simply glanced at her in an unprovoked attack onboard a Manhattan train over the weekend, cops and sources said.

Genesis Gittens – who just turned 20 on Monday – was yelling on a southbound L train at the 1st Avenue and East 14th Street station around 2:10 a.m. Sunday when a 28-year-old man sitting in front of her turned to look, authorities and law enforcement sources said.

Gittens then flew into a rage, repeatedly punching the straphanger in the face, as she sneered, “White boy” and “cracker,” according to a criminal complaint.

The repeated blows left the commuter with a bloody nose, although he refused medical attention, police said.

Gittens was arrested less than an hour later and charged with third-degree assault as a hate crime, according to the complaint.

She pleaded not guilty during her arraignment and was released, court records show.

In a separate attack around 9 a.m. Sunday, an apparently homeless person attacked a 35-year-old on-duty MTA cleaner from behind inside the 34th Street-Hudson Yards No. 7 train station and repeatedly punched him in the back of the head, cops said.

While the worker was on the ground, the menace – who had no shoes on – repeatedly struck him with his feet, cops and sources said.

The brute, who wore all gray and carried a blue blanket, took off after the attack and had not been caught by Monday, sources said.

The worker refused medical attention at the scene.