Even Wyman's most strident critics, however, acknowledge that many of Wyman's contentions are valid. Rubinstein, for instance, appears to largely agree with Wyman (and many other historians) that the influence of Palestinian Arab political leadership, led by Grand Mufti of Jerusalem Haj Amin al-Husseini, and the 1936–1939 Arab revolt in Palestine were factors in causing the British government to abandon their temporary mandate over Palestine, which was primarily to establish a homeland for the Jewish people that would be available to facilitate rescue of endangered Jews in their time of need. Both Wyman and his critics agree that their decision to abandon the mandate was embodied in the White Paper of 1939, which reduced Jewish immigration to Palestine to a yearly quota of only 10,000, with a maximum of 75,000 immigrants, and after a five-year period relegated all Jewish immigration to the approval of the Palestinian Arab polity. The long-lasting consequences to the European Jewry during the Holocaust of the abandonment of the mandate is generally recognized by Wyman's critics, though Wyman details the detrimental effects in greater detail than many of his detractors.