A California man who went by “Billy Badass” on social media allegedly threatened to bomb every synagogue within a 20-mile radius — then doubled down with more antisemitic rants even after cops threw him in a psychiatric hold.

Elijah Alexander King, 36, of San Luis Obispo, pleaded not guilty Tuesday to federal charges stemming from his August rampage of hate that has him staring down a decade behind bars.

A mugshot of Elijah King.Elijah Alexander King, 36, went by “Billy Badass” online when he allegedly threatened to bomb synagogues. San Luis Obispo County District Attorney’s Office

King used his “Billy Badass” X account to spew the hate messages on Aug. 28. “I’m gonna blow up every synagogue in a 20-mile radius,” King threatened according to federal prosecutors.

“This is a real threat send the police and report me for terrorism,” said a second messaged ten minutes later. King then searched for synagogues nearby on his cellphone, prosecutors said.

Police found King and had him check into a psychiatric hospital for monitoring where he continued to spew hate from the “Billy Badass” handle, states. 

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“I got arrested and put on a 3 day psych hold for my posts against the jews,” King wrote before re-posting, “[w]e don’t need gun control. We need jew control,” according to U.S. Attorney for the Central District of California Bill Essayli’s office.

This wasn’t the first time King made antisemitic comments on his social media page, which included praising Adolf Hitler and posting pictures of handguns, knives and mace. 

In the months following his release from the psychiatric hospital, King called and emailed the police detectives who had him evaluated, leaving then racist voicemails, Essayli’s office said. 

King is facing a maximum of 10 years in federal prison if convicted. He faces an additional five years for the threats made by interstate communication and false information and hoaxes counts. His trail date is scheduled for Jan. 13, 2026.