Earlier quoted context omitted.
Your definition makes no sense. "We should kill people from country X" isn't hate speech by your definition - it doesn't imply anyone is any less human than anyone else.
"should kill people" = "those people aren't deserving to live" = 1) either all humans are not deserving to live or 2) those specific humans are not deserving to live = if 2) country X are being dehumanized. 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…
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.