Earlier quoted context omitted.
Where do you see de-arrest? The article only says he wedged himself between an officer and another protester, which I'd say is normal in any protest.
> he wedged himself between an officer and another protester, which I'd say is normal in any protest. No, it’s not normal, that was a federal crime, and you absolutely cannot physically interfere with the police just because it’s a protest.
In practice I had experience of protests in 2010s Russia, and legitimacy is another huge factor there. E.g. even if the law enforcement was in the legal right to grab the other protestor, is it ok that they had the right in the first place.
I'm not saying either of these apply, but that because legality and legitimacy of grabbing a protestor is often unclear this de facto is a normal behavior at a protest and should not have any severe punishment attached to it.