In the summer of 1945 , as it became clear that the British were not planning on establishing a Jewish state and would not allow significant Jewish immigration to Palestine , Jewish public opinion shifted decisively against the British , and the Jewish authorities sent feelers to the Irgun and Lehi to discuss an alliance . The end result was the Jewish Resistance Movement , a framework under which the Haganah , Irgun , and Lehi launched coordinated series of anti-British operations . For several months in 1945 – 46 , the Irgun fought as part of the Jewish Resistance Movement . Following Operation Agatha , during which the British arrested many Jews , seized arms caches , and occupied the Jewish Agency building , from which many documents were removed , Begin ordered an attack on the British military and administrative headquarters at the King David Hotel following a request from the Haganah , although the Haganah 's permission was later rescinded . The King David Hotel bombing resulted in the destruction of the building 's southern wing , and 91 people , mostly British , Arabs , and Jews , were killed
King David Hotel bombing
King David Hotel bombing
Menachem Begin