Yes, when he said the Jews were intentionally importing substandard humans into western nations to undermine the US, I didn't need hand gestures to think he's a Nazi either.
>"I'm sorry for that tweet or post," Musk said Wednesday. "It was foolish of me."
He has famously thumbs-ed up significant chunks of such content and in the event mentioned here replied to an explicit statement (as outlined about) as being "the actual truth".
See, eg: https://www.bbc.com/news/world-us-canada-67446800
He is an unquestionable fan of Nazi like content, many will shrug it off as his grandfather was an actual Nazi fan (having to move from Canada(?) to South Africa because of such beliefs), and his uncle (IIRC, certainly a close family relative) was a senior member of the South African apartheid government.