He didn’t pay for a permit to do so. The police are there to protect capital, but under clearly-defined rules. Anyone who isn’t a fuckwit knows to pay the city its fees before doing something like this.
When JPMorgan Chase buys out a smaller bank, they apply for the permit in triplicate and pay all the fees, then make a donation to the Fraternal Order of Police. The cops then show up to attack protestors.
“Hi, I’m actor Mark Hammill. You might remember me from such unfinished games as Untitled Star Wars Game 3 and Untitled Star Wars Game 7.”