"Supposed to have"? Israel was "supposed to have" the entire Mandate for Palestine. Israel did, in point of objective legal fact, inherit all of the Mandate for Palestine, save for the part that was carved off for an Arab state (Jordan, the original two-state solution).
The UN does not have the right to arbitrarily divide a state into pieces. It can suggest such a thing, but it can not be implemented without the consent of the parties involved. Belligerent invasion does not cause the invaded state to be divided into pieces.
I will say again, Israel has not expanded into any territory that belonged to another State (with exception of small piece of Syria for security purposes.) Quite the opposite, Israel has voluntarily chosen NOT to apply sovereignty over territory it has sovereign claim to and has willingly given territory to other governing entities (Gaza, Areas A and B).
That is a lie.
The Balfour Declaration is quite clear that all the Jews were offered was facilitated immigration.
They not only were NOT supposed to take the whole country, but clearly they never paid for the properties they stole from the natives.
There was NEVER to be an "Israel" at all, and the UN partition was just to stop violence.
If you want proof, go read the White Paper of 1922 by Sir Winston Churchill.
{...
Unauthorized statements have been made to the effect that the purpose in view is to create a wholly Jewish Palestine. Phrases have been used such as that Palestine is to become "as Jewish as England is English." His Majesty's Government regard any such expectation as impracticable and have no such aim in view. Nor have they at any time contemplated, as appears to be feared by the Arab deegation, the disappearance or the subordination of the Arabic population, language, or culture in Palestine. They would draw attention to the fact that the terms of the Declaration referred to do not contemplate that Palestine as a whole should be converted into a Jewish National Home, but that such a Home should be founded `in Palestine.' In this connection it has been observed with satisfaction that at a meeting of the Zionist Congress, the supreme governing body of the Zionist Organization, held at Carlsbad in September, 1921, a resolution was passed expressing as the official statement of Zionist aims "the determination of the Jewish people to live with the Arab people on terms of unity and mutual respect, and together with them to make the common home into a flourishing community, the upbuilding of which may assure to each of its peoples an undisturbed national development."
It is also necessary to point out that the Zionist Commission in Palestine, now termed the Palestine Zionist Executive, has not desired to possess, and does not possess, any share in the general administration of the country. Nor does the special position assigned to the Zionist Organization in Article IV of the Draft Mandate for Palestine imply any such functions. That special position relates to the measures to be taken in Palestine affecting the Jewish population, and contemplates that the organization may assist in the general development of the country, but does not entitle it to share in any degree in its government.
Further, it is contemplated that the status of all citizens of Palestine in the eyes of the law shall be Palestinian, and it has never been intended that they, or any section of them, should possess any other juridical status. So far as the Jewish population of Palestine are concerned it appears that some among them are apprehensive that His Majesty's Government may depart from the policy embodied in the
Declaration of 1917. It is necessary, therefore, once more to affirm that these fears are unfounded, and that that Declaration, re affirmed by the Conference of the Principle Allied Powers at San Remo and again in the Treaty of Sevres, is not susceptible of change.
...}
The Avalon Project : British White Paper of June 1922
The Israel expansion into Jerusalem and the West Bank in 1967 was totally illegal.
