I’ve said for years that soulless!Sam was always still Sam, and not just a reasonable facsimile; that given the right circumstances, souled Sam could be just as cold and terrifying as the unsouled version.
But I was wrong.
Souled Sam is worse.
Because with his soul, he has his emotions, he can get ANGRY and SCARED and SAD and all of them mixed together have an impact on his actions and choices.
Oh look. Demon blood. Don’t mind if I do.