Poor Elon is in meltdown and seems to have lost the plot. He should concentrate on managing his company rather maligning good people in a malicious manner.
His company Tesla has serious cashflow problems which can rapidly develop into serious debt problems. Orders are being cancelled and production of the Model 3 is falling behind.
Maybe he has nightmares about his company and his money and he is looking for some distraction.
Advice my father gave me – don’t get into a pissing contest with a skunk! Musk appears to be unhinged.