> The 30 year sentence was for hiding documentation [...] it wasn't just "transporting Zines"
As far as I can tell, the moving of zines (he was pulled over and had a box in his car) is what's being presented as "hiding documentation" - not something beyond that.
> being sought under a federal warrant
Timeline seems to be that a warrant was obtained after pulling him over ("Sanchez-Estrada was then arrested on state traffic offenses, and officers obtained a search warrant [...]"). Can't find a source saying there was a warrant prior to this.
> The warrant was for documentation after the protesters shot fireworks to bring out first responders from the ICE facility, and allegedly one of the group shot a responder in the neck instead of the head.
It's true that demonstrators were setting off fireworks, and it's true that Benjamin Song later shot at a police officer who had drawn his gun. But it's just the government's narrative/speculation that the intent of the fireworks was to draw out first responders to ambush, and that Sanchez-Estrada's zines were in some way documentation of this despite him not being at the protest and his wife not being the shooter.