I wouldn't be surprised if it was nothing more than a joke made in poor taste if it was ever even said at all. At this point I don't know why the government would even bother anyway. The cat is out of the bag and if they start killing people like Assange they're just going to assure the next group does it anonymously from the shadows.
It would be much simpler to do little things here and there to create unresolved questions about the integrity of Assange/Wikileaks and let half the country fight with the other half about that instead of the leaks. Honestly I'm not even sure why he even did it so openly in the first place. If a powerful nation is willing to spend money to engineer controversy you're screwed.
I can only conclude that you don't think Yemeni's, Libyans or Syrians are human.