And an obviously stupid one that makes the entire movement look idiotic is going to fix that?

This isn't forcing anyone's hand. It just makes environmentalists look like assholes. Sure, shitting your pants in the name of whatever movement is a statement, but it's not likely it's one the rest want to make nor is it gonna do any good.

They literally escalated from just throwing food to trying to damage the actual artwork. Get real.

Just because their other attempts at protests failed to make the statement they were aiming for doesn't make this one any better. If they have a track record of doing stupid shit it's hardly a testament to their feigned statements.