Note the "peaceful" protests of the Arabs to the existence of Jews owning land in Palestine. Notice how even then, the Jews stress how they want to live in peace.
Another point mentioned is that Arabs at the time were moving to Palestine "in the thousands" as a result of Jewish hard work in making the land a paradise. And they were specifically moving to the most Jewish areas. A significant percentage, perhaps most, of today's "Palestinians" are descended from these thousands who did not live in Palestine before the 1920s.
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