Hmm a black Kyle Rittenhouse.
First I would say that where I'm from, a large city, a black shooter would be about half-screwed before he ever walked into the courtroom unless he was the Juice or something. But with all that video it would still look like a clear self-defense. A white mob chasing down a black kid and trying to kill him is some pretty stark optics.
But the mechanics of the shooting would be the same. The "victims" would still all be rioting scumbags with criminal records. There would still be enormous coverage, protesting and all of that. Given all of that... black Kyle Rittenhouse would probably get the same verdict(s).