sentences:  The crisis saw the first confrontation of nationalist Arab and Jewish forces, taking place in the Battle of Tel Hai in March 1920, but more importantly the collapse of the pan-Arabist kingdom led to the establishment of the local Palestinian version of Arab nationalism, with the return of Amin al-Husseini from Damascus to Jerusalem in late 1920.At this point in time Jewish immigration to Mandatory Palestine continued, while to some opinions a similar, but less documented, immigration also took place in the Arab sector, bringing workers from Syria and other neighbouring areas.Palestinian Arabs saw this rapid influx of Jewish immigrants as a threat to their homeland and their identity as a people.