Frankly now i'm very lost. I would think that any mafia, even the simple minded ones, who has managed two days without giving up any sent of their stench, would put the village 6 feet under by getting rid of the BG and letting the village kill another one of its members and deal the death knell by taking out the self proclaimed vigi, eliminating any hope for the village (as they would then have to rely on the inspector to give them any hint of a mafia while they are simultaneously picked off one by one until the inspector comes out, then the mafia takes him out and it's gg)...
But what do i know, apparently there are some mafias that want to troll the village and waste time lynching non power roles, unless somehow US was on that was more important the BG/Vigi. My only theory would be that the mafia somehow figured out that US was inspector, they killed him, and they planted a fake inspector among us. I highly doubt this holds any water though, but it is just a thought.