I'm guessing Rittenhouse will get acquitted, and frankly he probably should get acquitted based on the state of the law. It's going to be hard for a jury to conclusively decide, beyond a reasonable doubt, that he wasn't acting in self defense. The fact that he was a smooth-brained white-supremacist-military-fetishist-small-Dick-energy-LARPer is relevant to the story and how he should be treated by society going forward, but jurors may decide it isn't relevant (assuming they even get to hear about it).
I could be wrong and part of me hopes that I am, but part of me also hopes that if the law provides that he's entitled to claim self-defense under the circumstances he successfully claimed it. The law has the same effect whether popular or not, and the way to fix it is to fix the law, not to twist it so that someone gets wrongfully convicted, even if that person is an inveterate fucknut.