I guess I don't see how attacking the property of a hard working individual, who's political stance you don't even know, would be beneficial to making Musk feel some pain.

Burning Teslas in the dealership lot is short term pain, quickly recouped by insurance claims. Making people afraid to buy Teslas at all has the potential to kill the entire company in the long term. And that’s not something that can be recouped by an insurance claim or a corporate reorganization effort.