Consider whose voice, opinion, or stance stands to gain by making the police look incompetent or incapable of managing their own affairs.

Or, stands to gain from making Anonymous appear more threatening.

My guess is

"The protesters are now threatening officers at home, all methods of force to end this disturbance shoulders be tolerated."

Sad that nobody recognized this bit of social engineering for what it probably is: another way for the feds to vacuum up IPs for anyone dumb enough to try to log in using one of them. No, they're not going to SWAT your apartment tonight if you violate federal CISA laws. It's simply another data point (of thousands or millions) on you in MAIN CORE to profile you. For what? Who knows. If you already have an 'interesting' profile, maybe they will drop by.

You: "But the password didn't work - I didn't get in!" Judge: "You and your cellmate Brutus will have, oh... five years or so to discuss the finer legal points of your case... when you two are not 'otherwise' occupied. Baliff, let's not keep Brutus waiting."

I can't decide whether this was done for the lulz or to make the police look incompetent. Maybe both?

Or to create a fake threat against the police to justify further action, maybe? Or maybe a third party actor just doing it to create confusion and a lack of trust? I think a state actor would do a better job, though.