He did it once, turned around and did it again - incredibly intentional.
It is a Nazi salute, stop trying to pretend otherwise. You're trying to rationalize it because you can't accept that Musk is a Nazi.
Instead of defending this trash human being who's only wealthy through inheritance and luck in making some good bets with his capital (gained from his family exploitation in South Africa during apartheid). He's not a fucking genius, he's not a visionary, he's an asshole who has way too much money and a disgusting philosophy on life.
You're not his friend. He is not your friend. He is the enemy.