They aren't organized by the Sate. They have no official authority. So they aren't really a Militia.
They are a literal gang.
Stop calling them Militia.
It's a term used to describe a military force comprised of civilians. There's even a modern connotation of being against the state.
a military force that engages in rebel or terrorist activities in opposition to a regular army.
Gangs aren't purely for military purposes, so if the purpose of this gang is an armed attack against a govenrment agency, then it's not unreasonable to call them a militia.
I think the term is private vs state militias, and with this article being about armed militias, we are talking about armed private vs armed state militias. I think technically all 50 states have laws on the books that prohobit various forms of private armed militia activity. Is it enforceable? Maybe, but that would maybe probably cause a nation wide incident given the amount of violence these groups can wield (though they would probably still lose against any organized state militias or any official state/federal military force), as well as increase the chance of a homegrown insurgency popping up. That's just my armchair opinion or thought about it though, I'm just armchairing here.
Because that's how you get reactionary keyboad warriors going "OMG ACAB WHY ARE THEY ARRESTING THEM THIS IS LITERALLY 1984" on every website and media outlet. Also, probably firefights, officer-involved shootings, and further inflammation of a situation that was fucked from the start.
People don't tend to use their best judgement when blues are involved, especially in America.
Just to clarify, as far as I can tell, the trucks were reported by the National Guard to the US Forest Service who notified FEMA. The other was a call to a sheriff's office about a single individual. It's quite possible these are two actual but different things.