This is one dude who's got a real mental issue, and a hell of a vendetta against Mr Duke John Duplle.
First he spams random numbers that he thinks are men who his wife knows with threatening calls and vulgar messages containing pictures of his own pr*ck, then he starts harassing all these people with text about how this John's been f**king his wife and all that. Simply sick.
Hope somebody puts him down before he makes headlines as the next distraught and jealous husband on a shooting spree.