Oliver North named Abu Nidal NOT Osama bin Laden at those hearings.

All here:

Oliver North, Osama bin Laden Hoax, Iran Contra Hearings, 7/8/1987

At the time of the threat you mention the paths of Oliver North and Osama bin Laden could not have possibly crossed with North at the NSC (NOT the CIA) in Washington 1981 to 1986.

"On February 11, 1987, the FBI detected an attack on North's family from the Peoples Committee for Libyan Students, a sleeper cell for the Islamic Jihad {While with the NSC North had help plan the 1986 bombing of Libya}, with an order to kill North. His family was moved to Camp Lejeune in North Carolina and lived with federal agents until North retired from the Marine Corps the following year.

Around this time Osama bin Laden was in Pakistan managing the split from Maktab al-Khidamat in order to set up Al-Qaeda - basically no opportunity to set up any attempt at the lives of Oliver North or his family in the USA - too busy doing other things.