Whether the person he shot was a convicted or suspected felon is absolutely irrelevant, vigilante justice is no justice at all, not to mention that he had no way of knowing anything about the people he shot.

That said, I absolutely believe all three were legitimate self-defense. The problem here isn't that he shot people in self-defense, but that he was a minor in possession of a firearm. Anyone who enabled him to bring that firearm to Kenosha should be held responsible (if they haven't already).