That's ashame! If he sent you hate mail then I think it is up to you to do whatever you want with it. I know a guy who runs a website named Maddox and he always posts his hate mail up on his website. I think because if people sent it to him and its his personal website then its cool. Same way when people send fan mail. Anyway, I am not a lawyer but i thinks its wrong for what you are going through. Stay up bruh!