Rittenhouse’s killing of Rosenbaum may have been lawful. But that was scarcely self-evident to the bystanders who heard gunshots and then saw a killer holding an AR-15. The group of protesters who proceeded to chase and attack Rittenhouse could have reasonably believed that killing the armed teenager was necessary to save others from imminent bodily harm. If Rittenhouse had a right to shoot Huber and Grosskreutz in self-defense, the latter had a similarly legitimate basis for shooting Rittenhouse dead.
Put differently: Once Rittenhouse fired his first shots, he and his attackers plausibly entered a context in which neither could be held legally liable for killing the other. Whether one emerged from this confrontation legally innocent or lawfully executed hinged on little more than one’s relative capacity for rapidly deploying lethal violence. Rittenhouse had a more powerful weapon and a quicker trigger finger than Huber or Grosskreutz. Thus, he walks free, in full health, while Huber lies in a grave and Grosskreutz gets by without the bulk of his right bicep.