Here's the case: https://www.justice.gov/usao-ndtx/pr/antifa-cell-members-con...

The 30 year sentence was for hiding documentation being sought under a federal warrant after being called by his wife and asking him to do so. 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.

A lot of stuff to scrutinize and complain about in the sentence, but it wasn't just "transporting Zines"