Your vote is the only power you have. That means you should use it as effectively as possible. Which means you shouldn’t only use it on the ideologically pure, you also use it for people who are more in that direction than the alternative.
The result of this last election is someone who supports a Palestinian state lost, and someone who supports total Israeli domination won. Your takeaway that something else happened is rare and is not the takeaway of the media, the voters, or the parties. Palestine is now dead in American politics and support for Palestine in any form will now be seen as a liability, that is if any Palestinians are left after this term. Don’t shoot the messenger.
The salute is just a symbol of much larger antisemitic moves by Elon. It’s not hard to find neo Nazis posting swastikas and the like on X and many Jewish users have indicated that reporting those images goes nowhere despite them being specifically enumerated as banned in the official terms of use. There’s plenty of evidence out there that Elon is in fact a far right racist if not outright Nazi.