From RNZ
One attendee at the rally told AFP he thought Musk was making the gesture as a joke.
"He's very humorous, and he uses a lot of sarcasm. So when he did that on the stage, I don't think he meant it," said Brandon Galambos, a 29-year-old pastor and tech worker.
This is complete bullshit, you don't get to make a joke about being a Nazi, when you are on the world stage. It is like joking about carrying a bomb at the boarding gate in the airport. People will take you seriously.
Musk is an idiot, he has been sliding further right for the last decade.
This was unambiguously aimed at the far right, it may not be precisely a Sieg Heil, but those he was trying to reach know what he means.