Holy crap, that last video was eye opening and horrendous to watch. The police basically assaulted that person for holding an umbrella, then that person was obviously surprised and didn't want to let go of their umbrella, probably didn't even realize why it was getting pulled out of their hands. The police responded by pepper spraying everyone. It's incredibly obvious that this started because the officer aggressively grabbed that umbrella for no reason, and the crowd gets pepper sprayed.
Along with bringing in the heavy duty officers just moments before this happens, it's obvious that they just wanted an excuse to bring in their weapons