Mango Mussolini now has 700 active duty Marines and 2000 CA National Guardsmen on the streets of LA. Legally, they cannot do anything to the protesters unless they attack an ICE facility.
However, by all accounts, the protests are relatively peaceful. This action by the Orange Idiot is a provocation designed to enrage the crowd. I can only assume this would be pretext to enact the Insurrection Act.
If he does that, the military is no longer restrained by Posse Comitatus. I doubt Trump realized he did it, but he actually restrained the CA National Guard by federalizing them.
As citizen soldiers, they had some authority for police work, if needed. Once they were federalized, they became no different than any active duty soldiers. Posse Comitatus prevents the military from acting as police within the United States.
This comes from when the British used the military to police the colonies and the harsh actions they took. Policing should be surgical; the military is a blunt instrument. They are trained for combat. History has shown that the military, any military, is not capable of acting in a police capacity.
This level of pushback against his illegal policies needs to continue. He thinks he is King. We need to remind him that we once said there would be no Kings.