Historical Pattern of Tit-for-Tat Violence

When police killed Arizona rancher LaVoy Finicum in 2016 during the Malheur National Wildlife Refuge takeover, a grand jury deemed it a justified shooting. But for the Patriot Movement, it was an assassination. They call Finicum a martyr. So, what happens when people who have a deep-seated mistrust of the government finally have a justification to take action?