Irrelevant. We all have the same ancestors if you go back far enough.
Actually Max has a point.
DNA shows that the Palestinians and the Israelis were both Canaanites during the Bronze Age.
After the Bronze Age collapsed, the former Canaanites formed a number of smaller Iron Age kingdoms. The Israelite kingdoms in the West Bank were two of these smaller kingdoms.
DNA shows that the Palestinians diverged from the Israelis after the Bronze Age, so the Palestinians were probably from one of the other Iron Age kingdoms formed by former Bronze Age Canaanites.
Perhaps the Palestinians were Moabites, Ammonites, Edomites, or Phoenicians (all groups that used to be Bronze Age Canaanites, but diverged into separate Iron Age civilizations).