'Violence, vandalism and destruction of property'.  Do you mean the 'security barrier' that was run over? That's like protestors pushing over a fence, gate or barrier. The remainder of the incidences he mentions are trespass. You're not seriously equating that with 'violence', are you? Is that the best you and he can come up with? Greenpeace is a non-violent organisation - violence, as you describe, is against the environmental ethos, and companies and their agents in governments don't hesitate to use it. What's your position on the bombing of Rainbow Warrior?
Yes, a lot of money is lost when operations are halted and trespass is a 'criminal' (misdemeanor) esp when property is damaged (comparing a homeless person on one's property is trite). But often that's all activists have at their disposal. You like comparisons: I guess, then, you've sympathy for Trump's view 'both sides' were to blame for Charlottesville - both sides took to the streets. But what justifies the right's attack.