One problem we have now is that people judge a person's guilt or innocence before the law on what they wish would happen rather than the actual law. It is not surprising given that the media often misrepresents events and relays opinions as facts.
I believe he "may" be charged with a weapons violation if the rifle barrel s too short. He did not cross state lines with a weapon and I believe he met with the Proud Boys post the shooting event, so irrelevant. Precedent on the skateboard goes to an Olympia, WA cop shooting two kids because he "feared for his life". Shooting deemed justified.
Not that the law allows for it but my idea of a fair penalty would be stripping Rittenhouse of his right to carry any firearm for life thereby ensuring he never finds himself in a security or law enforcement role, ever.