Come now, even the Anti-Defamation League, hardly a habitual supporter of Musk, disagrees with this take. Your opinions are your own and you're free to believe he did Nazi salutes, but it does make you sound like you have an axe to grind.
When they were alive, if I had done what Elon did in front of either of them, that would have been problematic.
I think that's a decent yardstick. The absolute best interpretation is that Elon is someone who does not care if he does things that look like Nazi salutes.
I have relatives who suffered under imperial powers who to this day refuse to buy products made in that country, even though they're objectively good and in some cases the best in the market. I hardly think the trauma of war makes for good judgment, even decades removed.
I think your relatives would be quite justified in boycotting that one product.
You can make your purchasing decisions however you like. Other's don't. Ignoring war trauma makes someone a shit businessperson, at best.
Now that other companies are making EVs that compete directly with Tesla, they aren't reliably best-in-class or best-in-price-point anymore. Compare the Rivian R1T to the Cybertruck, or the Equinox EV to the Model Y, or the Ioniq 6 to the Model 3. The top of the line Model S still doesn't really have any viable competitor.
Tesla has phenomenal battery and motor tech, but their actual car design leaves a lot to be desired, and that's starting to hurt them now that they aren't the only game in town.
And the fact that their CEO throws Nazi salutes at political rallies does not help their market share. In Europe at least that's directly impacting their sales.