The history of the land is irrelevant here. The idea that you can claim ownership of a land because it used to be your homeland thousands of years ago is completely abstract. While the hard reality is that in order to take, or retake, ownership of that land, you have to displace other people that has been living there for many generations. You can't do it peacefully. You have to take their houses, their fields, evacuate and destroy their villages, steal their property, and push them back each time they try to defend themselves against all this.

Remote history won't convince anybody, anywhere, to leave their houses and live in a refugee camp. Though it might work to give a veneer of reasonableness to this expropriation, for the exclusive benefit of those who won't lose anything in the process.