So, annihilating the entire universe could be considered "protesting" in your view? Language meaning is based on norms, not absolutes. Each term or phrase has a range of applicability.

Peaceful protesting is generally legally protected in developed Western countries. Rioting, burglary, and assault are not, and police are legally and morally justified in using force to arrest the perpetrators.

Still a protest, just not necessarily a peaceful one.

Any action can be done in protest of something, right?

If I protest you for some reason that I could get some people to sign up for, could I break into your house and take your stuff?

You could do anything you want in protest. No where did I state that it absolves you of legal consequences. You protest in the form that you want, and if it’s illegal, the state will get involved.

But why does this get labeled as a protest and not say January 6th?

Well, destruction of government facilities for starters