The proposed UN partition in 1947 gave 55% of the land to a Jewish state and 45% of the land to an Arab state, yet just under 33% of the population was Jewish at that point.
It's easy to say with the benefit of hindsight that the Palestinians no longer have any hope of getting that much land now, but when the partition plan was presented to them, Arab leaders felt it was deeply unjust. It would also have placed hundreds of thousands of Palestinian Arabs in a Jewish state, and the Arab leaders did not think it was fair that these people would become a minority in what they considered indivisible land, living under Jewish sovereignty. Of course, at this point, it was British Mandate Palestine, not a sovereign Arab state, and prior to that, the Ottoman Empire. But that doesn't detract from - in the eyes of the Arab leaders at the time - the fact that the partition proposal was unfair in terms of land division.
You could argue that if they'd just accepted it we wouldn't be where we are now.
You could also argue that if the proposed partition was proportionate to population, or even 50-50, we wouldn't be where we are now.