Moroni not comes out with the clear accusation that Pahoran is a traitor. Moroni is presuming that Pahoran has become influenced by the culture of power, and he has adopted the motivations of the kingmen. Those were traitors, and Moroni had received authority to execute such traitors. Perhaps there is a blunt threat in Moroni’s letter that if Pahoran proves to be such a traitor, Moroni might exercise his right to execute traitors?