A maniac hardcore punk rock frontman allegedly terrorized tourists and workers around Yosemite National Park, demanding that a pregnant waitress’ baby “belongs” to him as he wreaked havoc across two California counties.

Anthony Mehlhaff, the lead for Los Angeles-based “Cancer Christ,” began his disturbing rampage at a local restaurant in the Buck Meadows area of Mariposa County around 1:45 p.m. on Wednesday, according to the Los Angeles Times.

Mehlhaff, 40, entered the dining establishment and confronted a pregnant waitress, telling her that the “spirits led me to you,”

“Your baby belongs to me, what time is your break because I will be waiting for you,” Mehlhaff said, according to the Mariposa County Sheriff’s Office.

Mehlhaff allegedly stole several drinks and assaulted another restaurant employee before fleeing to Yosemite National Park, roughly 15 miles away.

Mehlhaff eventually crashed his car near the Fish Camp area, took his shirt off and handed it to a witness to the wreck.

“You’ll want to keep this, I’m going to be famous,” Mehlhaff said.

While clearing the car, police discovered an Enola Gay smoke grenade.

Mehlhaff then stole a bicycle where he ventured to the nearby Tenaya Lodge, entering through the kitchen’s back door, placing his hat and other items in a refrigerator before grabbing a knife and threatening the workers.

Mehlhaff then stripped down to his underwear and told customers to leave or they’d be in danger.

Mehlhaff allegedly assaulted and attempted to “kidnap” the manager before the madman stole his car.

Driving back on Highway 41, Mehlhaff encountered a Tesla where he began extreme road rage behavior, tailgating the Tesla while making aggressive hand gestures before ramming into the car.

Mehlhaff was then chased by sheriff’s deputies in the area where he crashed the stolen car in Oakhurst and was subsequently detained by law enforcement and transported to a local hospital.

While being medically cleared, Mehlhaff assaulted a Mariposa County Sheriff’s deputies.

He was again detained and later brought to the Mariposa County Jail where he is being held on $100,000 bail.

Mehlhaff was charged with vandalism of $400 or more, vehicle theft, reckless driving, kidnapping, first-degree burglary and robbery, all felonies, according to jail records viewed by The Post.

A recorded message on his phone asked law enforcement and mental health specialists to “f–k off” and stop trying to contact him, the Los Angeles Times reported.

“Cancer Christ” mixes Christian, satanic and other “reptilian” imagery in an intentionally and outlandishly sacrilegious mix, the outlet reported.

The band’s lead refers to himself as “Saint Anthony” and reportedly professes genuine religious belief.

Recent albums and singles include “God Hates Cops,” “Satan is a B–ch” and “God is Violence,” with the latter album cover depicting Jesus Christ shooting himself in the head with a shotgun.

“Spreading the gospel through their unique brand of Reptilian Power Violence, Saint Anthony and The Snake People have been sent down from Heaven on a holy mission to make all politicians, pedophiles, and police officers suffer slowly,” the band’s now private website read according to the LA Times.