Who is George Haddad from Mao II and what is their importance?

The mysterious George Haddad is Lebanese, an intermediary between the terrorist organization headed by Abu Rashid and the rest of the world. A smooth talker and advocate for terrorism, he lures Bill into a sense of intellectual (if not physical) security and intrigue that draws him into what ultimately proves to be a life-ending trap. Meanwhile, Haddad and Bill engage in a series of intense arguments over the similarity in intent of terrorism and writing novels, a similarity that Bill had himself commented on (see "Quotes", p. 41-42) but which, as the result of his conversations with Haddad, he angrily rejects.