On June 30, 1924, the Dutch Jewish poet, novelist and diplomat Jacob Israel de Haan, who was living in Jerusalem as a journalist, was shot and killed.

The murder shocked Palestine and Europe, and the British authorities offered a reward for information that would lead to the arrest of the assassin, but the killer was not caught.

The 1929 Palestine riots caused unrest in the Haganah ranks because the organization was not ready and did not respond appropriately to the Arab attacks.

The other half retained the Irgun as a separate fighting organization, engaging in conflict with both British and Arabs in Palestine.

When the Haganah failed to fulfill its obligations under the amalgamation agreement, Tehomi resigned, and from then on allegedly engaged in independent illegal immigration activities and intelligence work.