>Since Rittenhouse was walking down the middle of a wide brightly-lit street towards a line of cops, it is probably not the case that those yelling "stop him" merely wanted to make sure that Rittenhouse did not escape legal accountability (for Rittenhouse's shooting minutes earlier of Rosenbaum).

Considering that these were protest against the police, it's not reasonable to assume that the people present had any faith in the police force, no.

>someone hit him on the head with a skateboard and grabbed his gun

Hit him on the shoulder. And after watching the video about ten times, it's looks like he stumbled and landed on Rittenhouse with the board, rather than actually swinging it. Unfortunately, we only have a few frames blurry video and Rittenhouse's word on the matter, since Rittenhouse shot and killed the man immediately.

edit: It looks like you edited your comment after I opened it to respond to make it more factual. Most of what I said above still applies, but I will point out the fact that, by your own admission, Hubor was attempting to disarm Rittenhouse "in the same motion" he made contact with his skateboard, but you insist he was at the same time swinging for the head show just how much opportunity there is to twist the facts of the case to suit whatever narrative you want to spin.