It looks ilke you're the one willfully disregarding the context.
In the videos' context, most of those gestures were clearly waves. The arm was relaxed and bent, the fingers were spread, and the hand was relaxed. The Joe Rogan clip was a bit iffy, but the context is telling.
The Musk gesture was different from all of these. It included a straight arm, a straight hand, fingers joined and curved, etc.
Rather than debunked, Musk's tasteless jokes in the aftermath confirmed the Nazi connections.
https://globalnews.ca/news/10975722/elon-musk-nazi-jokes-salute-backlash/