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 views 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.

The Declaration was endorsed on August 10, 1920, by the principal Allied Powers in the Treaty of Sèvres. The Jewish Agency of Palestine, consisting of Zionists and non-Zionists, was recognized under the Mandate as a public body... in matters affecting the establishment of the Jewish National Home. 

Yet this British pledge was almost immidiately obstructed with irksome British interpretations, the first being the White Paper of 1922. This paper was augmented in 1939, restricting Jewish immigration to a dwindle in the wake of the Nazi Holocaust, for reason of promises also made to the Arabs. They, similarly to the Jews, had contributed fighting forces to Britain in WWI, and emerged with less than they had anticipated in compensation. Yet within a decade of WWI, they had acquired several states - Yemen (l918), Egypt (1922), and Iraq (1926, excised by Winston Churchill out of the Mandate). Since WW II, they have acquired yet more states - Algeria, Jordan, Kuwait, Lebanon, Lybia, Marocco, Southern Yemen, Syria, the Sudan and Tunisia, apart from the already existing Iran and Saudi-Arabia. Today there are 22 sovereign Arab states - and one tiny Jewish state at the fringes. This one small strip of a Jewish state is too much, while 22 Arab states are not enough.
 
 

At the Peace Conference in 1918, other peoples seeking independence turned to the Zionist leadership for counsel and assistance, including the Arabs. Dr. Chaim Weizmann, who was to become first President of Israel, assisted them and others. This Arab indebtedness was acknowledged by Prince Faisal, representing the Arab Kingdom of Hejaz, the chief spokesman for the Arab cause and son of Hussein, the Sharif of Mecca, the most prestigious post then in the Arab world. In a letter dated March 3, 1919, to Felix Frankfurter, then very much involved in the Zionist cause, Prince Faisal wrote:

...We feel that the Arabs and Jews are cousins in race, having suffered similar oppressions at the hands of powers stronger than themselves, and by a happy coincidence have been able to take the first step towards the attainment of their national ideals together. We Arabs, especially the educated among us, look with the deepest sympathy on the Zionist movement. Our deputation here in Paris is fully acquainted with the proposals submitted yesterday by the Zionist Organization to the Peace Conference and we regard them as moderate and proper. We will do our best, in so far as we are concerned, to help then through. We will wish the Jews a most hearty welcome home.

...Dr. Weizmann has been a great helper of our cause, and I hope the Arabs may soon be in a position to make the Jews welcome in return for their kindness. We are working together or a reformed and revived Near East, and our two movements complete one another. The Jewish movement is national and not imperialist; our movement is national and not imperialist; and there is room in Syria for us both. Indeed, I think that neither can be a real success without the other.

People less informed and less responsible than our leaders and yours, ignoring the need for co-operation of the Arabs and Zionists, have been trying to exploit the local difficulties that must necessarily arise in Palestine in the early stages of our movement. Some of them have, I am afraid, misrepresented your aims to the Arab peasantry and our aims to the Jewish peasantry with the result, that interested parties have been able to make capital out of what they call our differences.

... I look forward, and my people with me look forward, to a future in which we will help you and you will help us, so that the countries in which we are mutually interested may once again take their places In the community of civilised people of the world.

Believe me,
 xxxxxxxxxxxxxxxxxxxxxxxYours sincerely, FAISAL.

The Zionist leaders recognized that a cardinal point in resettlement must be Arab- Jewish co-operation, and that the rights of the Arabs in Palestine must be respected. Wherefore in 1918 Dr. Weizmann, accompanied by Major W. Ormsby-Gore, who was attached to the Zionist Commission.as Political Officer of the Government, went to Akaba to meet Prince Faisal. Faisal’s father Hussein revolted against the Turks after a correspondence in 1915 with Sir Henry MacMahon, the British High Commissioner in Egypt who, on behalf of the British Government, had promised independence after the war to the Arab territories of the Ottoman Empire. The meeting between Dr. Weizmann and Prince Faisal resulted in the exchange of the famous Faisal-Weizmann Agreement for the establishment of an Arab and Jewish State and their friendly and close collaboration, and Faisal's letter to Dr. Frankfurter.