Arlosoroff's hope for peaceful cooperation and compromise with Arabs would be severely tested. In 1929, the consciously aggressive Betar Youth Movement, organized under Ze'ev Jabotinsky's Union of Revisionist Zionists, took part in a coalition to assertively enforce and enlarge a Jewish presence in the proximity of the Western Wall. The activities of Betar and their associates inflamed an explosive reaction from the Arab community, in whose perception these activities had dishonoured the Muslim holy site on the adjacent Temple Mount. The violent Western Wall Uprisings of 1929 ensued, which resulted in the loss of many lives, including civilians. Instead of inciting further Arab tensions, Arlosoroff strongly criticized the Revisionists for insensitively provoking the animosity.