The truck also says “No Mullah”. Meaning it is against the current Iranian government but also opposes replacing it with a Shah.

Edit: Additional context: Pro-Israel/Shah rioters ATTACKED the truck and it had to flee from them. Start of the event can be seen here https://files.catbox.moe/x63p08.mp4


Wow I had not seen that yet. This is an amazing propaganda piece by ABC7 “news”.
It frames the event as “Chaos erupts as U-Haul drives into crowd during anti-Iranian regime rally in Westwood”. ABC7 also avoids any angle of the anti-Mullah on the truck and tries to frame this as an “attack by a pro-Iranian terrorist” by extremely selective choice of angle and words.
ABC7 shows people screaming loudly while the truck very clearly stops for them. ABC7 also leaves out crucial information on the motivation of the truck, and also does show the pro-Shah mob attacking the truck.
It is fairly obvious why nobody was hurt, because the truck did not try to hurt anybody.