This is an old video clip of him admitting that there is no Palestinian Nation...
Also see Zuheir Mohsen who was a Palestinian leader of the pro-Syria as-Sa'iqa faction of the Palestine Liberation Organization (PLO) between 1971 and 1979, he said "The Palestinian people does not exist. The creation of a Palestinian state is only a means for continuing our struggle against the state of Israel for our Arab unity. In reality today there is no difference between Jordanians, Palestinians, Syrians and Lebanese. Only for political and tactical reasons do we speak today about the existence of a Palestinian people, since Arab national interests demand that we posit the existence of a distinct Palestinian people to oppose Zionism."