AL's passive is that he is immune to actions of non-humans.
Passive - Holy War] - Skull Knight is a self-proclaimed "foe of the inhumans" having waged war against demonkind for a millennium. As the foe to inhumans, Skull Knight has developed extensive knowledge about them. He is immune to the actions of non-humans, and will be informed any time a non-human character targets him. If he's targeted twice by the same non-human character, he will learn their identity and role name. The third time, he will learn their full role. If they target him a fourth time, he will kill them. A vote against him at day's end counts as an action targeting him.
Though technically Salah didn't target him but AL targeted Salah triggering his passive, acc to Salah's words. What happens then?