Re Rittenhouse, to quote Dickens, "the law is a ass....."
No one else was shot or murdered at that demonstration / riot. So he brought a rifle to defend himself from an event that the didn't have to attend. It's not like they were attacking his home. He was the instigator and not entitled to an innocent verdict based on self defense.
I put it on the judge, if he wasn't a senile white nationalist himself, the outcome might have been different. One can only hope that the civil cases to come will wipe the smirk off Rittenhouse's fat face.