I followed all the events from home not that far from where all this happens, and even after seeing both sides of the story I have to say that I'm going to side with the police on this one. There were a lot of people with completely viable causes who were there protesting and if it had just been them then that would have been fine, but the presence of "anti police-state" people and anarchists like the black bloc totally ruined everything. Just because there were a lot of police there doesn't mean shit had to be so evil looking and bad, if everything had been "peaceful" like they said then it would have all been good.
Some people argued that the police let shit happen on Saturday to justify the expensive security budget but it can just as easily be argued that the protestors fucked shit up to provoke the police to make themselves look like the victims in the aftermath and make the police look bad....