There were Arab riots throughout 1920–21 in opposition to the Balfour Declaration. The Arabs tried to show the British the instability of Palestine and that a Jewish homeland was ungovernable. Riots increased in 1929 after the fourth Aliyah – 133 Jews were killed by Arab mobs during the 1929 riots. The Arabs claimed that Jewish immigration and land purchases were displacing them and taking their jobs away. These riots were also instigated by false rumours that the Jews were planning on building a synagogue near the Western Wall. These riots led to the evacuation of Hebron's indigenous – largely non-Zionist – Jewish population.