'They became violent.'
According to the story 1 person became violent and attacked property, and with 'they became violent' you unfairly called them all violent, a word which is most often used to describe actions which physically harm people.
Gov't agents have a history of infiltrating organisations and promoting or committing violence in their name in order to discredit them, you should remember that before blaming the action of 1 person on the whole group that they claim to represent. /they're still all idiots though, the supply and demand of housing is down to the gov't and property developers, not a few of Google's minions.