He specifically stated that he was inviting people to an act of civil disobedience.
Which is illegal.

I fail to see Civil Disobedience before the officers began cuffing people. Didn't see the quote. Anyway, then I wholly support them. There's no reason for a law to exist to prohibit dancing in any area, and there's no reason to enforce that law.
not telling them the statute or law/legal precedent that they were being arrested/detained for (which they CONTINUED to do), and then illegally assaulting and arresting people without cause
That's my biggest loving grievance. The richardhead Sgt couldn't even tell them why they were being arrested, he skated around the question twice and then just ignored it for the remainder of the time.
Leave it to blockland to piss and moan about small stuff like this.
This isn't small stuff, it's never small stuff when our Police start assaulting, detaining and arresting people for
dancing at a memorial.
The court had recently passed a law that made it illegal to dance there, among other places.
Alright, so the police had cause to arrest them. So they were placed under arrest without being read their miranda rights (could have been read later but regardless) or being told the statute they were arrested under.