They alleged Musk's donation proves he is not an ally of progressive causes, and instead shows he is a closeted conservative.
Before the rescue mission began, Musk tweeted that he had designed an "escape pod" built from "the liquid oxygen transfer tube" of a SpaceX Falcon rocket that could be used as a submarine to extract the children.
Getty ImagesElon Musk called a hero British cave diver who criticized him a "pedo guy". Unsworth had also stated in a column on Mediate, that he felt it was a publicity stunt for Musk because he had to know it wouldn't work.
Mr Musk didn't take the criticism lying down and launched a furious attack on the experienced diver after responding to a piece in the New York Times which called his effort "commendable".
In his first tweet of the thread, Musk said he didn't meet Unsworth and that he "never saw this British expat guy who lives in Thailand".
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'The submarine, I believe, was about five-foot-six long, rigid, so it wouldn't have gone round corners or round any obstacles'. Unsworth said the billionaire "was asked to leave very quickly".
Several key figures involved in the rescue said that Unsworth was integral to the success of the operation.
Furthermore, Musk insisted that his submarine (designed in consultation with "cave experts on the Internet", he wrote) would have worked. He then denied Unsworth's claim that Thai officials asked him to leave the cave site when he went there July 9, saying, "Thai navy seals escorted us in - total opposite of wanting us to leave".
"Bet ya a signed dollar it's true", he wrote in another tweet that has also been deleted. By "sus", Musk may have meant "suspect", implying that a British person living in Thailand is in itself dubious.