Snuff is Enough bug

Basically I lost quite a lot of Humanity because of NPCs dying. At first I even wondered if I could reload and save them in time but nope lol, its cutscenes, which makes this quite annoying. Is there any way to regain the humanity back or I'll have to just deal with it for the rest of the game?

Edit: Forgot to mention that my character is a Toreador, so the cut is quite high and will probably affect the rest of the playthrough.