The video footage doesn't show how disruptive he was being; but I find it reasonable that he was clapping in a way that the the person running the public comment meeting had specifically asked people not to do in the name of expediently getting to as many comments as possible.
This is the kind of situation that I think would come up in basically any human society, even some maximally-anarchist society without the institution of police. If you're having a public meeting to decide on some policy, you need someone to be in charge of the procedural rules of that meeting; if someone doesn't like something about the meeting and is doing something that arguably breaks the procedural rules, you need someone to adjudicate this and decide whether or not to compel them to leave. If someone is compelled to leave a meeting, and they resist, you need someone who will physically force them to.