Their home in 1948 was supposed to be Trans Jordan. Maybe you should go back and read the treaties that actually pertain to the topic at hand.
A key document, its centenary currently being "celebrated" is the Balfour Declaration:
Here's the text in full:
Foreign Office
November 2nd, 1917
Dear Lord Rothschild,
I have much pleasure in conveying to you. on behalf of His Majesty's Government, the following declaration of sympathy with Jewish Zionist aspirations which has been submitted to, and approved by, the Cabinet
His Majesty's Government view with favour the establishment in Palestine of a national home for the Jewish people, and will use their best endeavors to facilitate the achievement of this object, it being clearly understood that nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities in Palestine or the rights and political status enjoyed by Jews in any other country.
I should be grateful if you would bring this declaration to the knowledge of the Zionist Federation.
Yours,
Arthur James Balfour
Foreign Office
November 2nd, 1917
Dear Lord Rothschild,
I have much pleasure in conveying to you. on behalf of His Majesty's Government, the following declaration of sympathy with Jewish Zionist aspirations which has been submitted to, and approved by, the Cabinet
His Majesty's Government view with favour the establishment in Palestine of a national home for the Jewish people, and will use their best endeavors to facilitate the achievement of this object, it being clearly understood that nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities in Palestine or the rights and political status enjoyed by Jews in any other country.
I should be grateful if you would bring this declaration to the knowledge of the Zionist Federation.
Yours,
Arthur James Balfour