You're reading that backwards, it is Elon who is feuding, which is to say Elon defies the rulings of the court and Elon slanders the judge on twitter.

So meanwhile the judge is trying to enforce a law that Elon is actively, and spitefully, breaking.

To be fair the “feud” wording that’s been used in US media is much more supported by Musk handling this situation by posting weird AI generated memes about the judge than the judge issuing a court order and then imposing penalties for refusing to comply with it.