Somewhere in a quiet back DC office, the DHS lawyers are trying hard to keep a straight face. Dude goes to a riot and attacks a detention facility, refuses repeated lawful orders to disperse, and gets hit with a non-lethal weapon? He is the proximate cause of his own injury. The Feds didn't come to his apartment or his basement Antifa training space and attack him without cause.
He'd be better off spending his time with a GoFraudMe page.