I am sorry, but this article makes little sense. Sadat was long dead by he time Al Qaeda was created in August 1988. And how Sadat could have been concerned with OBL, who was a virtually unknown Saudi running around Peshawar at the time of Sadat’s death, is beyond me.
Sorry, I should have read with greater care. The “crazy boy” is Qaddafi. And the statement was indeed made, and as I recall, quoted in an article by Heikal.