Even if you see it as a white good and not as activism then surely the fact that the resale value will be much lower may assist your decision, unless you're being an activist and choosing the car specifically for what it stands for, no?
Did you know VW, BMW, Mercedes and Porsche used slave labor in WW2? What do you say about the owners of those brands?
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.