That goes right out the window when it's shown that Rittenhouse ran away from the mob and only fired when they were about to attack him on the ground. That IS self defense.With an AR-15 assault rifle Rittenhouse thrust himself in the midst of others who were rioting. He thrust himself into danger. He cannot then call attacks on him to remove the rifle from him as self-defense. He's got an AR-15. His attacker was armed with his hands (Rosenbaum), or a skateboard (Huber). That's not self-defense.
This was vigilantism.
For the first time in American history a jury approved of vigilante justice enforced by assault rifles, as a Wisconsin jury declared Kyle Rittenhouse innocent of all charges. Rittenhouse killed two men and wounded another as he was defending the town ... or so he said. Far right extremists across the country are cheering madly. Rittenhouse is their hero.