...OP, I don't think you understand how legal jurisdiction works. Twitter is headquartered in the US, and being under US jurisdiction, the US Constitution applies. Musk's citizenship as a private citizen is irrelevant. If the intention indicated is to identify all journalists given access to private company records, then yes, it is a Constitutional violation of the freedom of the press, as stated clearly in the First Amendment.
...OP, I don't think you understand how legal jurisdiction works. Twitter is headquartered in the US, and being under US jurisdiction, the US Constitution applies. Musk's citizenship as a private citizen is irrelevant. If the intention indicated is to identify all journalists given access to private company records, then yes, it is a Constitutional violation of the freedom of the press, as stated clearly in the First Amendment.