Richard Perle said that the fact that Iraq harbored Abu Nidal
was enough reason to go in..
More than once Bush referred to Abu Nidal as the guy who masterminded the Achile Lauro hijacking. (he got his terrorists wrong)..

Im sure the US would take a dim view if any country were to harbor a terrorist who blew up an airliner for instance.
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apparently not when the terrorist is CIA operative Luis Posada Cariles
who blew up a Cuban airliner killing all aboard, and masterminded other bombings in Havana.. ANd the country harboring him?? THe US.