You're free to (legally) spend your money how you want, but other people are free to form an impression you and adjust their interactions with you as a result. The car you buy shouldn't subject you to physical violence, but it's perfectly acceptable for people to choose not to associate with you or do business with you as a result and that's a consequence of choices you make.
Do you really know that for sure? Have you asked them if they'd think less of you if you bought a Tesla now?
I judge people by their actions, not the sins of their parents. The companies you list aren't run by the same people, so your question is irrelevant. If Tesla were to toss out Musk and ensure he has no influence then people would likely stop judging Tesla owners the same way they do today.
I'm responding to your comment in a public forum - why would you specifically choose the chance of a low return on your money vs other cars unless you're specifically choosing to be an activist, that's not activism?