Close to half a million Jews live on West Bank land captured by Israel in 1967, including East Jerusalem. Some settlers claim a God-given right to live in lands they call Judea and Samaria.
Actually, almost all of us claim the right of international law to live in the Jewish national homeland as well as historical and cultural rights.
And read this summary:
The legal position of the whole of Palestine was clearly defined in several international agreements.
The most important is the one adopted at the San Remo Conference (following the disintegration of the Ottoman Empire in the First World War), which decided, on April 24, 1920 to assign the Mandate for Palestine under the League of Nations to Britain. An agreed text was confirmed by the Council of the League of Nations on July 24, 1922 and came into operation in September 1923.
In the preamble to this document it is stated that "...the Principal Allied Powers have also agreed that the Mandatory should be responsible for putting into effect the declaration originally made on November 2nd 1917, by the Government of His Britannic Majesty, and adopted by the said Powers in favour of the establishment in Palestine of a national home for the Jewish people." The declaration of November 2, 1917 is the famous Balfour Declaration and in this document, it was given international ratification.
Moreover, in Article 2 of the document, the League of Nations declares that "The Mandatory shall be responsible for placing the country under such political, administrative and economic conditions as will secure the establishment of the Jewish national home, as laid down in the preamble.”
In the preamble it was clearly stated that "recognition has hereby been given to the historical connection of the Jewish people with Palestine and to the grounds for reconstituting their national home in that country."
It was on this basis that the British Mandate was established. Britain betrayed its duty and far from keeping to its undertakings did everything to jeopardize the establishment of the Jewish National Home and finally decided, in 1947, to end its mandate unilaterally, leaving Palestine on May 15, 1948.
Meanwhile the UN (which had inherited the League of Nations) decided on the partition of Western Palestine into two states, Jewish and Arab, but this decision of November 29, 1947 was not only rejected out of hand by the Arabs, but seven Arab armies invaded Palestine to put an end to the young State of Israel which had been established on May 14, 1948.
And more there as well as here and here.