Their land was the British Mandate. Before then it was the Ottoman Empire. In it contained many Jews, and both would argue that they had a historical claim to the land. Hence why a two state solution is what is supportable, I think. If history will record facts, it will be to record that the initial two state solution was rejected and that the conflict which led to uplift was driven by such rejection and the years of resistance that has brought nothing but pain and hatred since. Sure, you could argue that the uplifting was bad on the part of Israelis, but it’s not one sided, as evident by the uplifting of Jews from elsewhere and the victims of the ‘resistance’ who are innocent civilians. Israel isn’t the only country formed by such partition, Pakistan is another, and much of the Middle East was created with what many see as artificial boundaries. Peace won’t stand a chance if historical grudges are carried on.