I repeat, I feel like scum have been given the Knights of Favonius as fake claims. The issue is Jean herself flipping as scum, I actually originally thought the Knights of Favonius were just scum outright, but Scaramouche flipping scum has shot that theory down. I would guess Rej was either converted by scum, or the narrative of this game's flavour is weaving a very specific storyline that isn't outright cannonical to the game's narrative. But this is why flavour is the weakest argument you can make in Mafia. Because while every flavour will have a vision, it's kind of hard to be able to predict exactly what the host or host(s) are aiming for with the flavour they're using.