Palestina is not only “state” that was there before thou. It’s piece of land that changes ownership every few hundred years if not decades.

So it’s not really valid to say what was before because then somone can say even before that it was different. Then it will keep on going until beginning of history and both Palestinians and Israeli would have to leave. As opposite if we say let’s look only certain time back then we might end up going closer to present in same manner.

IMHO this conflict has to be solved with todays borders (Not adding more land no IzraelI or Palestina).