Imp, dropping the honorific intentionally as I'm speaking frankly outside the confines of this mafia game, sidebar.
Can I offer you a new mafia bible? You can throw out that old ragged Jimnosis edition. Nobody asks questions anymore. Instead, here's my advice to you about how to play mafia, and what you're missing:
Every single player in this game is an individual human being. You have to engage with and understand each player as a separate and particular human being with his own independent nature. There are no universal rules for the right thing to do at any moment, because everything depends on with whom and to whom you are doing it.
You must know your audience, and tune yourself to that audience.
If your actions are not making the other players react in the way that furthers your win condition, you are doing wrong, not they. Everything you say should be thought through in relation to each other player. If you find yourself repeating something in exasperation because nobody seems to get it, for example, and you can't see where everyone else is coming from - that means you're saying the wrong thing. Mafia is a social game where the individual human natures of the players is everything, and you need to understand how your actions will play into that network. You don't seem to see other people very well — your words suggest you're always thinking about what you would do and what a given thing would mean to or from you. To play mafia, you have to learn the people with whom you're playing, because you'll get nowhere locked inside your own head.
To quote your old quote you were focusing on before, "aggressively questioning everything you find odd or scummy" is a recipe for failure because other people think differently from you. The things that seem important to you are not necessarily important to anyone else, or at all, and often you will just need to shut up about them because it doesn't direct other people toward fulfilling your win condition.