[To people who think he's a Nazi: yes, I've read all the arguments, no, I don't care - giving him the benefit of the doubt still makes him a gigantic shitlord who think its funny to do Nazi salutes.]
If you own a social media platform and have this amount of reach you can never be “just a troll edgelord”.
Musk has been going to far right rallies and jew hating for some time now.
eg: https://clearthis.page/?u=https://www.crikey.com.au/2025/01/...
The goalpost does not need to be moved to "if he's not literally operating a gas chamber, he's fine".
The best interpretation is that he doesn't care how it looks to others when he does a Nazi salute. Like others said, he's more 90s edgelord than actual jew-hating Nazi.
And the car markets in Europe are showing him what they think of people who do Nazi salutes publicly.