Rittenhouse was, so that’s what my analogy is using too.
Meaning that, just like in Rittenhouse’s case, the fact that someone is openly armed is mundane and not a cause for concern in and of itself, at all.
Someone walking around openly armed is absolutely not mundane at all. If it’s police it’s a minor cause for concern, if it’s an untrained civilian who looks underage, it’s much greater cause for concern. If he’s walking around at a protest to supposedly “protect businesses”, he’s a clear and direct danger. What the law says doesn’t change what he can do with a weapon like that, and thus what threat he poses.
Rittenhouse provoked no one
You’re unaware of the basic facts of the case. Drone video clearly showed Rittenhouse pointing his weapon at people, repeatedly. This direct threat to others is what eventually provoked Rosenbaum into trying to take his gun off him. After Rittenhouse neutralised him by shooting his pelvis, he then decided to execute him on the spot, which was well beyond self-defense. He then shot two others who believed him to be an active shooter (and he demonstrated he was by killing one of them).
You can’t expect to go to a protest, heavily armed, pointing your gun at people and expect people to be all okiedokie about that. It’s a clear provocation.