I'm not saying you have to agree with the actions taken here. It's fine to argue that they were illegitimate. But summarizing that series of events as "teacher arrested for clapping in opposition" is so misleading that it is almost an outright lie. The situation is more complex than that, nor was it the case (as the headline implies) that this teacher was arrested due to opposing the data center measure.
Notably, the crowd was told not to clap during people's speech; the teacher clapped after a speech ended.
There is no lie. The crowd was upset and voicing their displeasure. The police responded to protected speech, at a venue intended for public commentary, by forceful removal. If that isn't an arrest due to opposing the government's proposal, I don't know what is.
My reading is that he was arrested for not leaving after was asked to leave, which is slightly different story.
He would not be arrested if left after being asked.
It however is entirely normal in these types of meetings to require the audience to refrain from making any kind of comments or noise during a speaker's turn. And people regularly get kicked out of these, I've been to many - and you absolutely can get arrested if you refuse to leave.
The fact that someone can actually ask you to leave a public meeting like this implies some sort of weird authority that genuinely should not exist.
Rule of law on violating an unlawful request in a situation like this one is not complex. It's the same as when an officer asks you to stop filming.
So is clapping impolitely, and yet here we are.