“Can anybody tell me what the Magna Carta has to with oil?”
Absolutely nothing. These people thoroughly enjoy destroying historical art pieces and artifacts to demonstrate their moral indignation toward human progress and modernity.
It’s time to arm the guards at museums and historical sites. You come in to destroy, you get shot.
Simple solution that would end this petulant activity with a quickness.
Now that's some performance art I could understand. Then leave the bullet-riddled corpses mounted on the walls by their superglued hands.