Time.
With what certinity can you predict the global political scenario for the next 70 years.
What is the probability that as newer generations become adult citizens, they can come up with a workable solution.
Is it for certain zero?
Think about it, it's 75 years.
One side came into existence, cause they felt they cannot live with the others. Leave aside the lot that stayed back, for whatever reasons. Talking about them here, will only open unnecessary pandora's box. I am talking facts here.
Now there are two sides, and for 75 years have invested on proving who is right in their birth outlook.
That's nearly three to four generations, give or take in a way.
For any generation to change outlook radically, it cannot happen in their living time. Unless there is any catastrophic change, owing to things like large scale invasions (Which are not going to happen in this nuclear age) / Climatic changes (again unlikely as I don't think we are sitting on any fault lines here) / Devastating wars (to engage in them both should have the wherewithal and you know the answer to that).
The only thing left is Bollywood style change, which we should never get into unless we believe in fantasy being real.
More than changing outlook, you should not forget the support systems built, to keep the outlook going. These support systems in these two sides cases, have many forms and faces. You think they will let their livelihood be threatened, because some imaginary trade brings peace initiative? Let us say they do too, seeing some future danger for existence.
What will the outside support system say? It takes more than inner strength, to keep things going at nation level. These outside support will punish the players at that point, as many deals have been struck based on the outlook. There will be tangible and intangible losses for them, and they sure as hell will not let it happen.
Lastly never forget that, people act on benefits they get. They never do it for lofty notions of greater good, as it's written in books or shown in movies. Forgetting realism, forgetting practicality leads to massive failures.
I am not ruling out the future generations realizing the futility of this conflict, but don't expect any tangible action for next one generation at least or as I feel two in the least. That is how I predict this 50 years period.
PS: 2 to 3 centuries is but a foot note, in the time line of a nation or culture as in our case.