WHO PROVOKED WHOM?

Is it that essential in the aftermath of last night events?

We've heard different opinions from all sides, and one of the frequently discussed points was WHO PROVOKED WHOM? I do not think this question is essential in the circumstances of peaceful demonstration. Even if there were few provocateurs among demonstrators, police should be able to deal with them in civilised manner, protecting the safety of others and respecting their right to protest. But, instead, what we evidenced was the brutal display of power and violence against protesters, PEACEFUL PROTESTERS. It is also essential for me that there were no independent reports or evidence (even in formal press release issued by police) on armed people among demonstrators. There can be no justification for using physical force in these circumstances!