Unless it's the same people in charge of the company as it was in 1941 then it doesn't matter. Everyone knows that many German companies have a terrible past, but they've long since taken a clear stance against it. There is literally no correlation between these German car brands and Tesla. It matters what they do today (and possibly the recent past).
If you want to boycott things over the distant past you literally couldn't use anything.
Tesla deserves this because of Elon's current actions. If he steps or gets removed and Tesla continues to operate with a different philosophy there should be no issue with them in, say, 15 years.
So, if the Volkswagen Group car brands all dissolved and the people in charge created a new company that'd be just fine? Why would we boycott a company for what happened 80 years ago? We can just build a wall around Germany then.
What exactly is problematic? The past has happened and it cannot be changed; how you deal with it is the only question, and the Germans in particular have dealt with it admirably. It only matters what they do with they're given. Nothing is static, especially not a company which is just a reflection of their owners and employees.
Would it make you or anyone happier if we drove in Skodas rather than Volkswagens?