the hypocrisy in the letter is that he insults the guy repeatedly for being a fool and then explains that he is trying to win him to the dark side because he could be so influential.I don't know if it's genuine or not. But these people do make mistakes, and most of the content, personal spots, and recipient, make me think it is.
It could be completely authentic but they just don't care. For 2 reasons. There's nothing anybody can do about it. At least in the arrogant minds. And most people won't believe it anyway. Even those astute enough to know the evil they are doing are STILL questioning it's veracity.