Tesla's do add trauma to minorities and others/ allies lives because of what Elon and Trump stand for compared to what they stand for. If they see a whole road field with Tesla's that probably affects people the hardest, compared to it being just a smaller few Tesla's in another road.
These protesters, do not want any nazi getting influence. So they'l likely act quickly with a lot of emotion out burst without thinking things through or having empathy for others.
However by targeting cars that were already bought, they're not putting much of a dent in Elon's sales. For actual change they should change where they are targeting. Such as car dealerships. For their cause they get two in one, reducing Elon's possible profits and not potentially hurting innocent people. Fires can spread to other houses if left unattended and that can be so dangerous.