Contradictions abound; Palestinian leaders claim to be descended from the Canaanites, the Philistines, the Jebusites and the first Christians. They also “hijacked” Jesus and ignored his Jewishness, at the same time claiming the Jews never were a people and never built the Holy Temples in Jerusalem.
Eli Hertz, Mandate for Palestine: The Legal Aspects of Jewish Rights
Putting aside the vile hatred of Jews found in their textbooks, the Palestinian Authority brainwashes their children into thinking Arabs are descended from the Philistines:
Do you know when the Palestinian people came to be, or when their national identity was formed? A textbook taught at one of the Palestinian Authority schools states that the "ancient history of Palestine bore witness to the invasion of the Israelites, led by Joshua in [the 12th century B.C.E.], and to their battle with the Canaanites and the Palestinians." If that is the case, Joshua and his army didn't conquer Canaan, they conquered Palestine, which, according to this textbook, existed in the 12th century B.C.E. (if not earlier). In that case, it was Palestinians who lived between the Mediterranean Sea and the Jordan River.