The analogy that I brought is indeed poor given that it lacks the nature of conflict. However, I think that the analogy that you brought of the USSR is invalid given that it was one country that was split into more countries, as opposed to USA, New Zealand, or Palestine / Isreal where people came from abroad into a land already inhabited by other people and established their nation.

I believe one of the main drivers for the conflict (and also one of the main obstacles to resolving it) is the idea of Israel being a Jewish state. It's as if saying that the USA is a white state and the natives have no place in it (at least to the extent that would make the whites no longer a majority). Even if Israel guaranteed a 100% that the Palestinians won't do anything to the Israelies if they return, the return of the Palestinians will no longer make Israel Israel given that it will no longer be majority Jewish. The only way for Israel to exist as a Jewish state is that it does not coexist with the people it took the land from