Abu Nidal and his organization, again

The former key aide to Abu Nidal, `Atif Abu Bakr, has been spilling the beans in interviews with lousy Saudi-financed media. I don't know his motives but they are suspicious.  He insists that Abu Nidal was working for Israeli intelligence (which very well may be) but why would you work for him all those years if you think that he was working for Mossad?  Furthermore, he tells the story that two Mossad agents, Mike Harari and David Kimche snuck as photo journalists into the famous Khartoum summit in late 1967 (the 3 Nos summit).  He relies on this picture to make his case: but the picture of both men are available on the internet and they don't resemble them.  Harari (who was considered a hero in Israeli propaganda although he was the one who "keys" a poor Moroccan waiter back in 1974 and insisted that he was Abu Hasan Salamah and was behind the murder of the waiter in front of his pregnant wife) would have been older than the picture, and David Kimche used to visit Lebanon during the reign of Amin Gemayel and his pictures were published in the press: he was bald with a bad toupee over his head.  But I believe Abu Bakr on one thing: that his organization was behind the killing of Zuhayr Mohsin (the head of the pro-Syrian regime, As-Sa`iqah, one of the most thuggish and murderous organizations of the PLO).  Mohsin never posed a threat to Israel and specialized in theft and burglaries in Beirut during the war.