Did Musk even say/imply what that random account claims?
To me it seems clear that the guy said yada yada Im experienced and would have worked for free and Musk replied "yeah we were stupid for not hiring you".
The more interesting part is that Indians are such an eggshell topic for Americans that even slightly accidentally implying something like Musk might have done is immediate cause for a backlash like that. The whole thing reveals more about Musk's audience than about Musk himself.
I think Elon was being sarcastic meaning he wouldn't how that guy because he believes that guy is dumb