Palestinian population grew 8-fold since '48

And of course, they all do have the right to leave and return to the land, as long as they don't want to go through Israel (unless they are Israeli citizens).

What motivated the question?

Do you have any thoughts on the OP itself at all?

And of course, they all do have the right to leave and return to the land, as long as they don't want to go through Israel

For instance, do you think that the growing Palestinian population (both inside and outside of Israel) will result in any policy changes?

As with pretty much everyone else on earth, that depends on where and when they were born, as well as what state they are currently a citizen of. A right like this is hardly absolute.

Cyprus

The population of Cyprus is 80% Greek and 20% Turkish. In response to a threat by the majority Greek population to unite the island with Greece in 1974, Turkish forces invaded the island. As a result of the invasion, Cyprus was divided into two halves: one Greek and the other Turkish. Two hundred thousand ethnic Greeks moved to the Greek-controlled half of the island, and 50,000 Turkish Moslems moved to the Turkish part of the island.

From the time of the partition of the island, the Greek half has flourished there are no refugee camps, no terror, and no incitement of terror against the Turks, despite the fact that Turkey settled 100,000 more Turks on the Turkish-controlled half of the island (in contravention of international law) and brought in tens of thousands of soldiers to maintain its military regime. In contrast to the Greek half of the island, the Turkish half has experienced severe unemployment and a stagnant economy.

U.N. Secretary-General Kofi Annan devised a far-reaching proposal to reunite the island in 2004, but in a national referendum, the Greek half of the island rejected the plan. Nevertheless, the U.N. plan does provide an interesting insight into the international community's view of the right of return in general. The plan did not hint at a general right of return of those who had fled their homes upon partition of the island. Only Greeks over 65 years old were granted anything like a right of return, and even then, only on condition that they not constitute more than 10% of the total Turkish population, and no more than 20% in any particular area.

Had Israel accepted such a proposal, it would have had to export Palestinians rather than bring them back for the simple reason that Palestinians constitute over 10% of Israel's population.