Context matters. I'd never shoot somebody over a skateboard... unless they were using that skateboard to hit me in the back of the head. In Rittenhouse's shoes, Bobby would have just have held his hands up asked "guys please stop" while being pummeled with a skateboard, with guy trying to stomp his head, with the crowd yelling "get him," with guns present, surrounded by a hostile crowd. Bobby probably would have suffered serious head injuries if not death that night, but at least he'd have his principles.
Funny how he can see how the Jan 6 rioters presented a clear and present danger to Pelosi, AOC, Pence, etc, but can't see it when a guy is actually being physically assaulted by numerous people in the middle of riot that he's on the wrong side of. I get party loyalty, I get not liking Rittenhouse (I don't care for him either).
Since Bobby expects us to believe he wouldn't responded with deadly force in that situation, I assume Bobby believes he wouldn't responded with deadly force. Kudos to Bobby for being willing to sacrifice his life for his principles. Most of us, including the 12 jurors, would have responded as Kyle did. Personally, I think it would be foolish not to defend one's self, but maybe I just lack conviction. I do consider myself more of a pragmatic person than a principled person.