Speaking on behalf of Police, (I am a University Police Officer), I did not see anything that would constitute brutality. The Officers showed up told you to leave, you did not obey. They are allowed to use force to do their job. I actually give them credit for holding back. They could have used pepper spray, tasers, or worse case batons to break it up. In the case of the people "put to sleep", that is a painless technique that is safe for the Officer and the subject.