You can't possibly be serious.
He'd just shot someone. They were taking down an active shooter. Do you think a mall spree shooter should be legally entitled to shoot everyone who tries to stop them, or is that still murder? Same fricking difference.
Again. Does not fucking matter if he was being attacked. Rosenbaum was unarmed and hadn't even hit Rosenbaum, so there's no justifiable way for Rittenhouse to think he's about to be killed or permanently disfigured. And short of that, lethal force is not justified in self defense.The first shooting, to me there's not enough evidence to say definitively, the video is not great. Rittenhouse is claiming he was being attacked.
He could've probably shoved Rosenbaum. Maybe even justified smacking him with either a fist or the butt of his gun. Shooting Rosenbaum? Fuckno. That's how a vicious murderer would respond.
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What you seem to not get, is that Rittenhouse is the one who's seeing devils, in this analysis. That's why he panicked and shot Rosenbaum without any kind of justification whatsoever.
There's no way you're going to be legally able to make the argument that an unarmed man who'd never laid a finger on you posed a threat of death or great bodily harm to you.
Edit: I'll also make the point that, like so many others, you're choosing to focus solely on the videos, and ignoring all the witness testimony that Rittenhouse provoked Rosenbaum into trying to disarm him.
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"Belief" doesn't even matter in the first place. What matters is whether a reasonable person would believe it, in that circumstance. You made this point yourself, unwittingly, by bringing up someone who really believes they see demons. That belief is not a defense. It is motive. The two are not the same thing.
Pointing out that Rittenhouse had a motive for killing Rosenbaum is not the same thing as saying he was legally justified in doing so.