There had already been rioting and attacks on and massacres of Jews in 1921 and 1929. During the 1930s, Palestinian Arab popular discontent with Jewish immigration grew. In the late 1920s and early 1930s, several factions of Palestinian society, especially from the younger generation, became impatient with the internecine divisions and ineffectiveness of the Palestinian elite and engaged in grass-roots anti-British and anti-Zionist activism, organised by groups such as the Young Men's Muslim Association. There was also support for the radical nationalist Independence Party ("Hizb al-Istiqlal"), which called for a boycott of the British in the manner of the Indian Congress Party. Some took to the hills to fight the British and the Jews. Most of these initiatives were contained and defeated by notables in the pay of the Mandatory Administration, particularly the mufti and his cousin Jamal al-Husseini. A six-month general strike in 1936 marked the start of the great Arab Revolt.