Here in the US, I feel sympathetic to this. I don't think Tesla drivers are calling for fascism, but I do think that they're tacitly supporting something very much like it. I can't help but feel a bit of anger every time I see one.
This is because Americans does not have places in their country with mementos like "In this building Gestapo tortured 20 people to death ..." or "659 allied soldiers died liberating this city" or "In this complex of buildings over 500 thousand people were gassed to death"
For Musk it was a funny free speech thing. For Europeans it was very personal and very painful part of history.