What are the palis if not arabs?
"Many authorities have addressed the misconceptions surrounding the word Palestine. The name derived from "other migrants from the northwest, the Philistines. Though the latest arrivals, and though they only exercised control over the whole country for a few uncertain decades, they had been the cause of its name of Palestine. These Philistines were an Aegean people, driven out of Greece and Aegean islands around about 1300 B.C.E. They moved southward along the Asiatic coast and in about 1200 attempted to invade Egypt. Turned back, they settled in the maritime plain of southern 'Palestine', where they founded a series of city-states." (James Parkes, Whose Land? (Middlesex, England: Penguin Books, 1970), p. 17.)
They were the Phillistines of biblical times. They were wanderers. I have even read Arab essays that refute their Arab origins.
Funny you should ask...
"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." --- PLO executive committee member Zahir Muhsein on March 31, 1977