"Cody Balmer, the suspect arrested for arson after setting Pennsylvania Governor Josh Shapiro's house on fire on Sunday was reportedly angry with Shapiro after the state of Pennsylvania auctioned off Balmer's property."
https://www.timesnownews.com/world/us/us-news/was-cody-balmer-upset-with-gov-josh-shapiro-over-property-seizure-court-document-surfaces-article-151411593
But yeah, let's go with antisemitism.
He also apparently has a rap sheet going back almost ten years that includes assault, theft, and forgery.