Israel did not cause the Arabs to leave http://web.archive.org/20020604080915/holyland-isreal.tripod.com/pal-refugees.htm, Beirut Telegraph (September 6, 1948).
“It is … undeniable that no settlement can be just and complete if recognition is not accorded to the right of the Arab refugee to return to the home from which he has been dislodged by the hazards and strategy of the armed conflict between Arabs and Jews in Palestine. The majority of these refugees have come from territory which … was to be included in the Jewish State. The exodus of Palestinian Arabs resulted from panic created by fighting in their communities, by rumours concerning real or alleged acts of terrorism, or expulsion. It would be an offence against the principles of elemental justice if these innocent victims of the conflict were denied the right to return to their homes while Jewish immigrants flow into Palestine, and, indeed, at least offer the threat of permanent replacement of the Arab refugees who have been rooted in the land for centuries.”
From the "Progress Report of the United Nations Mediator on Palestine" http://web.archive.org/web/20051210224540/http://domino.un.org/unispal.nsf/9a798adbf322aff38525617b006d88d7/ab14d4aafc4e1bb985256204004f55fa!OpenDocument by Folke Bernadotte. 16 September 1948. United Nations General Assembly Doc. A/648. Part one, section V, paragraph 6.
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Folke Bernadotte 1
Swedish diplomat 1895–1948Related quotes
"Keeping Faith: Memoirs of a President" page 355 https://books.google.ca/books?id=c-hncyLhPjoC&pg=PA355 by Jimmy Carter

Norman Finkelstein & Former Israeli Foreign Minister Shlomo Ben-Ami Debate: Complete Transcript http://www.democracynow.org/finkelstein-benami.shtml
Sourced statements on the Middle East

Ibid.
"The Ends of Zionism: Racism and the Palestinian Struggle"

"Palestinians are an invented people, says Newt Gingrich" http://www.guardian.co.uk/world/2011/dec/10/palestinians-invented-people-newt-gingrich
2010s

In a speech to Arab diplomats in Stockholm; Quoted in the Jerusalem Post (23 February 1996).
1990s

“From Jewish terrorism against Arabs it is a short step to Jewish terrorism against Jews.”
"On three fronts" (3 August 1938) as quoted in * Rebirth and Destiny of Israel
1954
91
Philosophical Library
New York.