1. It is said, yes it is, but it doesn't correspond to the game. And the dragons in the gorge call those who split off traitors, because by separating they weaken the entire tribe.
2. The Necros aren't newcomers - only Sandro was sent there on assignment, while the others have been there for a very long time.
3. What you wrote about the wolf pack and the knights is nonsense. The wolves didn't take vows of knighthood, did they? Or are you trying to say that you should treat your opponent exactly as they fight you? Then why not drink the blood of vampires? Why not act dishonorably by using allies and then throwing them into a dungeon (like the Necros did with Sandro in Breath)? Why not eat the fresh corpses of defeated enemies? Why not turn enemies into skeletons? In short, you are wrong, because knights differ from vagabonds and mercenaries precisely in that they follow the Code; if they start spitting on the Code, then what kind of damn knights are they?