Compare the coddling of armed Oregon militia members by the state to its vicious treatment of the Standing Rock Sioux and their supporters protesting the Dakota Access Pipeline. So far more than 120 people have been arrested at the latter and the police have brought out armored vehicles, LRAD sonic cannons, pepper spray, tasers, batons, you name it.
Yes, white privilege certainly played a role in this. Can you imagine what would have happened if armed supporters of Black Lives Matter had occupied federal property? But I think the ruling class has less fear of right-wing "patriot" militias than they do of protesters fighting against police brutality or pipelines, since the latter poses a more direct threat to their interests. Historically, we've often seen the state deploy armed right-wing paramilitary forces in order to crush forces on the left (e.g. the Freikorps).