“We hate oil! Let’s block traffic and force thousands of people to idle, burning more oil than they would’ve if we hadn’t blocked them!”
Absolute brainless bellends.
And yes, the actual art is fine. But they still do actual damage to other parts of the museums – spray-painting walls and destroying frames & display cases. And when they threw crap at the Mona Lisa, they tried breaking through the glass protecting the painting first, so they could destroy the actual painting.