Anti Fa is a private army. Look at them in that light.

Of course they are a bunch of soy-boys, and have delusions of utopia running in their addled brains.
But, when the time is right, professional mercenaries will show up and become "leaders" in their group and outfit them all with guns and grenades.

And, if i was a really good psychic, i could go to Portleattle and find a warehouse full of these "guns and grenades". Its all been planned.