Start using our brains, Notice only a few crossed the baracade, notice a few got into a shouting match, etc.
It has been discovered, there are those who do this on purpose in order to cause law enforcement to act against protesters. They are the ones who are members of law enforcement themselves, PROVEN !
If you are going to protest, make certain you know who you are protesting with.
Wonder what would have happened if all protesters carried self defense ?