You actually think he defends free speech? The guy that personally canceled a tesla client order because that client made a blogpost Elon Musk did not liked:
https://www.theguardian.com/technology/2016/feb/03/elon-musk-blogger-tesla-motors-model-x
Or that is so freedom of speech that he blocks any attempt by his workers to organize:
https://www.vox.com/identities/2019/9/30/20891314/elon-musk-tesla-labor-violation-nlrb
His notion of Free Speech is likely _him_ being able to say and do what he wants with no consequence. As for everyone else... Not so sure he see's it that way.