Blowing up an empty building isn't an act of violence? Not all violence is equal, but that's still clearly violence. Violence: "behavior involving physical force intended to hurt, damage, or kill someone or something."
You opened by saying "property damage isn't violence." But, of course it's violence. So, you should not be surprised that somebody responded with, "yes it is."
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At least you're not crazy like certain other people are.
I've yet to be charged with a crime against my old pre-internet PC monitor for smacking it(for no reason) every time my PC was acting up
In a country in which people die because they don't have enough money? It can be deadly.