It's important to analyze all events and the timeline of events through a color-blind and non-sensationalized lens. This is not a trial to determine if racial biases are present in court or one or more systems that make up the justice system, that is an independent issue that must be addressed later. The key item at hand was which (if any) discharging of a firearm by a citizen towards another citizen with intent were justified at the time of discharge.
You got a young kid openly carrying an assault weapon, barely legally, at an American demonstration. This is not illegal per local laws. Nor is this a privilege restricted to any one group of people, all 17 year old citizens present could, as a result, have done the same and perhaps outnumbered him and told their own version of events. That's what people don't understand about this case, you don't have to be a certain color to open carry an assault weapon at a protest. Do I think this is wise? Not necessarily. Nevertheless, this is codified law. You can change the law, but to do so you first must abide by it and allow others to.
Before getting to the "first" physically aggressive action, the assault and attempted battery on Rittenhouse by the first deceased person, you must recognize there are two states a weapon can be in when one carries one on their person. Rest state and "ready state". A rifle slung on your back or pointed downward is not "ready state". Carrying it with both hands and your finger on or near the trigger, and obviously as well as pointing the barrel at a person where if fired would either strike them or nearby them, is "ready state". This is a very important factor in determining if one is reasonable in assuming they would soon be shot in an environment where guns are present and therefore not automatically a threat to life and limb.
You have two "groups" (though what's important to realize is the individual nature of offenses) utilizing their right to protest and publicly assemble, while yes, being armed. Free speech and provocative speech is generally allowed but there are exceptions that are (usually) made on a case-by-case basis. Inciting a riot, fire in a theater, etc. these are all vaguely defined and largely depend on the circumstances and reasonably assumable intentions of the defendant. If, and only if the Kyle Rittenhouse did not engage in assault (threatening, menacing, etc.) before himself becoming assaulted and nearly battered, the discharge of a weapon on a person who literally just got done assaulting and attempting to batter you before chasing you is not such a stretch from a justified homicide in an inherently chaotic and violent setting. Not one to speak ill of the dead but the guy shot has a record, not just criminally but mental health concerns as well. That doesn't look good for character or legal defense. I'm not saying it's right that he's no longer here or that he decided to fire upon him I'm saying a 17 year old does not have the ability to perform a mental health analysis and diagnosis whilst being attacked by unknown projectiles in an unfamiliar environment. When attacked, it is not a citizen's job to play psychiatrist or doctor in the heat of a moment assault when your life is threatened. It's a tragedy, perhaps a failure of the mental health or criminal justice system, nothing more. It's not so much about the degradation of the deceased's character more so about the circumstances and environment both men created leading up to the moment the weapon was discharged. Sure you could say since the guy was hospitalized for trying to kill himself, it only makes sense that if he doesn't value his own life, how could or why would he value the life of others, basically suggesting he tried to cause severe bodily harm to Rittenhouse by throwing a plastic bag of unknown items which could have been anything. Rocks, frozen water bottles, etc. if you're struck at the right spot at the right velocity you could end up unconscious, perhaps in a coma, fatal bleeding, TBI if you fall and your head stikes a rock, etc.
Huber's is a lot more complicated. Will expand on him and the third later but essentially it's like if a mob of people says an undercover/plain clothes cop just shot someone and he's a "mass shooter" with a fake badge. Who's really at fault. The people who believe they are acting in the scope of the law and the interests of the nation who fatally subdue him, or those who in turn let him go when he turns out to actually be a mass shooter and 50 people get killed at a nearby school. None of this is simple really.
In short, mistakes were made.