And THIS is what the 2nd amendment is actually for. California needs its own state-run militia to defend its territory from Federal overreach.
It was never about individual civilians owning weapons. All that would do, is give Trump a justification to invoke the Insurrection Act. But if the State of California itself is armed against tyranny, then the people's rights are being defended.
The people setting those fires should absolutely be charged for their actions. But their actions don't negate the Constitutional rights of everyone else who is protesting. And calling in the National guard before the local authorities have declared the situation to be out of their control, is a direct violation of Constitutional law.