We should thank Newt Gingrich for bringing up the fact that the term Palestinian as referring to Arabs is a recent invention, as reported in the New York Times:
Does Newt Gingrich believe in a two-state solution to resolve the Israeli-Palestinian conflict? Democratic and Republican administrations since the 1990s have adopted that framework for peace in the Middle East, but Mr. Gingrich suggested that he might break with it, calling Palestinians an “invented” people and the current stalled peace process “delusional.”Pity that Gingrich has backed down from the controversial statement.
But he needn't have.
Gingrich's statement is backed up by Zuheir Mohsen, a Palestinian leader of the pro-Syria faction of the PLO who March 1977 gave an interview with the Dutch newspaper Trouw...
Daled Amos: When Gingrich Says The "Palestinians" Were Invented--Maybe His Source Was...A Palestinian