Without having thought about it for more than about 10 seconds: I guess I associate violence with something more personal: an actual person or living thing, or personal property. I guess "corporate property" is where it gets more into the grey zone for me.
But I see your point. Destroying a thing (even corporate) is a pretty extreme reaction that I can only see making sense after having exhausted all other "peaceable" avenues.
People that see these things as detrimental to society though are likely pretty motivated.
Calling the "destruction of property" violence though—I might take issue with that.