Let's set aside the reason he banned the links, there's no need to debate that. Elon Musk bought twitter because of his concerns about freedom of speech/censorship right?

This is a Tweet from him regarding freedom of speech in April of this year

"By “free speech”, I simply mean that which matches the law. I am against censorship that goes far beyond the law. If people want less free speech, they will ask government to pass laws to that effect..."

Each incident in which he bans an account or censors links, like this, is evidence that his concerns about freedom of speech might be disingenuous.

But you don’t know what happened in this instance. Wait for a while to see if the van stands and/or Twitter makes a statement regarding this. As of now, it just seems that everybody on HN are taking part in a collective confirmation bias session.