Remember that whenever you create a tool to silence people, you are building a weapon that can be used against yourself. As recent elections have shown, sane politicians aren't always in power. The only long term solution is to build a system that works even when your enemies are in charge.
Even in Europe, which has much stricter bans on hate speech and xenophobia than the US does, and where capital punishment is banned, claiming capital punishment should be unbanned is legal.
This is circular reasoning. If we've already established that I might not think all humans deserve to live, you can't claim that thinking I deserve to live means I think I'm more human than everyone else.
It's perfectly possible to think someone deserves to live less than I do while still thinking they're human.
Such tortured logic is hardly "direct line implicit", which is exactly why your definition doesn't work.
if 1) do you consider yourself a human? A) yes, then why haven't you killed yourself? Since you haven't you think you're more deserving of life relative to everyone else and therefore are dehumanizing everyone but yourself, if 2) ok, you've publicly proclaimed that you don't think you're human which then let me add a second rule. Only humans have right to speech.