Trouble with that premise is, there was no 'Palestine' to be a part of; at least nothing beyond the regional descriptive label; no autonomous people nor government; no nufin'....There was no "immigration." Immigration is going to a country to be a part of that country. The settlers were not imported to be a part of Palestine. They lived separate lives and were imported to populate a planned Jewish state in Palestine.
Of course there was a Palestine. It also had provisional statehood per the League of Nations. What are you talking about?
There was no nation of Palestine until 1988, and you and the rest of the islamomoron propagandists have failed to prove otherwise. Now produce the LoN treaty that gave Palestine provisional statehood, remembering that trans Jordan was part of the Mandate for palestine