Omar Mateen, the deranged Muslim shooter behind the massacre, held a grudge against Latino men he met at the popular gay club because he felt used by them, the man told the network. "I've cried like you have no idea. But the thing that makes me want to tell the truth is that he didn't do it for terrorism," the man told Univision Noticias anchor Maria Elena Salinas in an exclusive interview on Tuesday. "In my opinion he did it for revenge."