Samlen, I agree with basically everything about that post, but I'm just gonna say this for the sake of covering possibilities.
If I was a serial killer, I'd view the mafia as more of a threat than a lynch, as a potential stalker could find me out and shoot me while a town sided cop would just see me as innocent.
It's not only possible, but likely that Duffie was dousing those who he thought was mafia in an attempt to help out the town.
We don't know that the Duffie was necessarily working against the town. Yes, third parties are largely unpredictable, but I'm pretty sure he was serial killer-y.(which miraculously turned into our favour).
If I was a serial killer, I'd view the mafia as more of a threat than a lynch, as a potential stalker could find me out and shoot me while a town sided cop would just see me as innocent.
It's not only possible, but likely that Duffie was dousing those who he thought was mafia in an attempt to help out the town.