Does anyone really believe that Arabs need a "green light" from Israel to kill other Arabs? Sabra and Shatila were committed by the Lebanese Christians in revenge for the assassination of the Christian President of Lebanon.
The whole operation was coordinated and controlled by the Israelis.
That has never been proven. I think an Israeli court of inquiry convicted Sharon of not taking adequate steps to prevent what happened, but that is a far cry from what you are claiming. If I remember correctly, Sharon won a libel suit against Time Magazine when Time claimed he had direct involvement in Sabra and Shatila.
Do you blame the press for being suspicious?
I blame the press for printing things as "news" before the facts are known.