Threatening to engage in legal activity is protected speech, especially in the case of a public figure. There is no actionable threat here.
Oh. Well it sort of seemed that way to me. I am not a lawyer but it seems as if when the fellow is talking about family, friends, and “no end” it’s sort of a nonspecific threat. That said it’s hard to get a conviction on this sort of thing. Very well, I am corrected.