Maybe if they're asserting their own first amendment rights, although I doubt anyone would question the BBC's free expression interests in sharing its broadcast

Maybe if they're asserting their own first amendment rights, although I doubt anyone would question the BBC's free expression interests in sharing its broadcasting with Americans (or Chinese or Iranians), or Americans' first amendment interest in choosing to access that programming, even though the BBC's editorial line isn't completely free of political influence from the British government. I thought their statement was that they help Americans exercise their first amendment rights in communicating with one another, which seems obviously true. Much like HN is doing right now, for example!