First, it is justifiable to punish the lawbreakers. For the sake of their causes, no one should break any type of law, even if they are a protestor or activist. Laws have been made for a reason, and people should follow them, not break them. If broken, they should be punished accordingly. So, lawbreakers should be punished, including a protester.
Secondly, these violent demonstrations put danger into the society and themselves. The law that they