The limits of Elon Musk's self-professed "free speech absolutism" were laid bare, critics said, by his decision to ban rapper Kanye West from Twitter over his latest anti-Semitic outburst.
Musk claims to be engaged in "a battle for the future of civilization.
"If free speech is lost even in America, tyranny is all that lies ahead," he tweeted last week.
In practice, this has meant gutting his team of moderators and reinstating controversial figures such as Donald Trump, who was banned for inciting violence with his false claims about election fraud.
Nevertheless, Musk's claim to be a free-speech absolutist -- including a mooted "general amnesty" for suspended accounts -- was always going to struggle to survive the clash with reality, and particularly the clash with West (officially known as Ye), who has mounted an increasingly vociferous campaign of anti-Semitic outbursts in recent weeks.
The final straw for Musk was West's tweet showing a Nazi swastika interlaced with a Star of David.
It followed an interview with conspiracy theorist Alex Jones, in which he declared his "love" of the Nazis and admiration for Adolf Hitler.
"The problem is that Elon Musk has a half-baked free speech philosophy," said Jacob Mchangama, author of "Free Speech: A History From Socrates to Social Media".
"Sometimes he talks about total freedom of speech, sometimes about respecting the law. But of course laws are very different around the world where Twitter is present.
"Some of the things (West)...
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