The case should never have been taken to trial. It was clearly self-defense. Rittenhouse was running away from them, they held a gun to his head, etc etc. There was so much public pressure to bring the case that the prosecutors felt they had to, despite having no hope of winning.
All 4 people involved were white, and all were there for nefarious purposes. Rittenhouse being there to defend the town is stupid, but the facts are that the other 3 were all criminals and there to riot (nothing to do with BLM). The one that held a gun to his head did so with an illegal firearm.
The prosecution was left arguing that Rittenhouse should have let hardened criminals beat him up, rather than defend himself.
What has been really awful about this case is how the media have used it to stoke up division through deliberate misreporting. Many people think that Rittenhouse shot black BLM protestors, not white rioters. Even today the Independent was reporting the victims as black.
I'm no Trump fan, but the fact that Rittenhouse was shouldn't prejudice the case.
The argument that if it had been a black man that the outcome would have been different is fair, however in this case they also shouldn't be prosecuted. Black people have been treated appallingly in the US judicial system, but the fix isn't to wrongly imprison white people as a gesture.