During World War I , Zionist volunteers fought in the Jewish Legion of the British Army against the Ottoman Turks During the 1920 Nebi Musa riots , the 1921 Jaffa riots and the 1929 Palestine riots , Palestinian Arabs manifested hostility against Zionist immigration , which provoked the reaction of Jewish militias . In 1935 , the Irgun , a Zionist underground military organization , split off from the Haganah . The Irgun were the armed expression of the nascent ideology of Revisionist Zionism founded by Ze'ev Jabotinsky . He expressed this ideology as '' " every Jew had the right to enter Palestine ; only active retaliation would deter the Arab and the British ; only Jewish armed force would ensure the Jewish state " ''
1929 Palestine riots
1929 Palestine riots
Zionist political violence