Did the Israelites displace the Palestinians when they arrived in Canaan from Egypt?

Answer 1

No.

From an archaeological perspective, the Israelites were either indigenous to the Judean Highlands or fled the heavily populated coastal region to the Judean Highlands. Most modern archaeologists are in agreement that the events of the Torah and Book of Joshua, featuring the Israelites coming from ancient Egypt and pushing out the Canaanite Tribes with military force, have no supporting historical evidence.

However, even if it were true that the Jews were migrants who settled in Canaan, that does not mean that the Canaanites they displaced were the Palestinians. The Levantine Arab identity did not exist until the 1200s. The people there were Phoenicians and several Canaanite tribes. Some of those people have become the Palestinians, some have gone extinct, some have been forcibly transplanted to Syria or Iraq because of the Assyrians who rearranged populations under their control, some have fled, etc. So while some may be the antecedents to the Palestinians, they are not the Palestinians. It is the same way that many of the Turks in Turkey are actually Byzantine Greeks who became Turks and therefore changed their identities and cannot extend their lineage back to the "Greek" days to say that they came first.

Answer 2

The question appears to be one about history than one about faith. Therefore we have to look to extra-biblical sources for the answer, or at least part of the answer. As Prioktan918 says, most historians say there is no historical evidence for the Exodus from Egypt or the military conquest of the Canaanite cities. The majority opinion is that the Israelites were themselves rural Canaanites who left the region of the rich coastal cities and migrated peacefully into the hitherto sparsely populated hinterland. They succeeded in farming this land where previous attempts had failed, in part because of the invention of the iron plough and the development of terracing.

Because the hinterland population was quite low, the Israelites would have absorbed the fellow-Canaanites they found there. Perhaps the people who remained behind on the coast were ancestors of the Palestinian people, along with the Philistines and various later arrivals, but we do not yet have much evidence for this.

Answer 3

After their arrival from Egypt, the Israelites displaced the Canaanites, the Hittites,
the Perizites, the Girgashites, the Amorites, the Jebusites, and some others, over
a period of several years.

There were no "Palestinians" there at the time. The Romans invented that name for
the area roughly a thousand years later, and nobody used it to identify themselves
until the 20th Century.