If someone owns a car made by a Elon Musk's brand, it does not automatically mean that they are also supporting Trump's BS policies or Elon Musk's unhinged crusades. It might just mean that they like the car.
If someone intentionally conflates these two concepts, they are just finding an excuse to bully others.
If you want to protest against Trump or Elon Musk, go for it. Organize marches in DC every week. Protest with your wallet if you like. Do not buy their stuff. Or sell your stock. And I am sure there are other ways to express your opinion in an intelligent way.
But please, do not spread hate against people who happen to own their products. It is disingenuous. And it might lead to vandalism or even violence.
By far not every Tesla car owner is an Elon Musk fan or a Trump's supporter. Even if they chose to keep their car after "Musk went crazy", it does not automatically mean that they support Musk's or Trump's actions in any way, shape or form.
They might just have chosen a different way to protest.