"Not citing evidence from the mouths of zionists themselves" alright I got you from several Zionist voices on the concept that Zionism/a Jewish state cannot be achieved without the "transfer" of the local population.
Nahman Syrkin, socialist zionist, said that Palestine was “thinly populated, in which the Jews constitute today 10 percent of the population, must be evacuated for the Jews." B. Katznelson and Y. Kaufman, eds., Ketvei Nahman Syrkin [Writings of Nahman
Syrkin].
Israel Zangwill, British zionist author and confidante of Herzl, in 1905 stated "[We] must be prepared either to drive out by the sword the [Arab] tribes in possession as our forefathers did or to grapple with the problem of a large alien population, mostly Mohammedan and accustomed for centuries to despise us." Speech delivered in April 1905, in Israel Zangwill, Speeches, Articles and Letters
(London: The Soncino Press, 1937), p. 210
Zangwill wrote in the League of Nations Journal in 1919 that Palestinians “should be gradually transplanted” in Arab
countries. In his book, The Voice of Jerusalem, in 1920. There, he advocated an “Arab exodus” that would be based on “race
redistribution” or a “trek like that of the Boers from Cape Colony,” which he advocated as “literally the only ‘way out’ of the difficulty of creating a Jewish State in Palestine.” Masalha, Nur. 1992. Expulsion of the Palestinians: The Concept of "Transfer" in Zionist Political Thought, 1882–1948
He also stated quite racistly, that "many [Palestinians] are semi-nomad, they have given nothing to Palestine and are not entitled to the rules of democracy."
Ze'ev Jabotinsky wrote in 1925: “If you wish to colonize a land in which people are already living, you must provide a garrison for the land, or find a benefactor who will maintain the garrison on your behalf . . . Zionism is a colonizing adventure and, therefore, it stands or falls on the question of armed forces." Jabotinsky constantly disparaged anyone seeking a "peaceful" route to a jewish state by calling them "peace mongers."
Ben Gurion, first PM of Israel, in a meeting with the Jewish Agency Executive in 1936 said "If it was permissible to move an Arab from the Galilee to Judea, why it is impossible to move an Arab from Hebron to Transjordan, which is much closer? There are vast expanses of land there and we are over crowded….Even the High Commission agrees to a transfer to Transjordan if we equip the peasants with land and money. If the Peel Commission and the London Government accept, we’ll remove the land problem from the agenda. Flapan, Zionism and the Palestinians , p. 260, citing Protocols of the Executive meeting.
Also in 1936, Schmuel Shmuel Zuchovitzky (later Zakif), a leading figure in the agricultural sector and a member of the
General Zionist Party Executive stated in a committee "I am convinced that it would be impossible to carry out transfer without compulsion. I do not see in this any immoral measure. I want to help the Jews to come to the Jewish state and to help the Arabs to cross to the Arab state. I know that these things are not so easy and involve a lot of difficulties …. And also [land] expropriation must be carried out." Compulsory transfer meant through the use of force. Protocol of the Jewish Agency Executive meeting of 12 June 1938.
Yosef Weitz, former director of the Jewish National Fund's Land Department, wrote in 1941 seeing “large [Arab] villages crowded in population and surrounded by cultivated land growing olives, grapes, figs, sesame, and maize fields . . . and once again I hear that voice inside me called: Evacuate this country” Another diary entry that same year: “They [the Arabs] are too many and too much rooted [in the country]… the only way is to cut and eradicate them from the roots.”
Weitz also wrote, "Amongst ourselves it must be clear that there is no room for both peoples in this country. No 'development' will bring us closer to our aim to be an independent people in this small country. After the Arabs are transferred, the country will be wide open for us; with the Arabs staying the country will remain narrow and restricted . . . The only way is to transfer the Arabs from here to neighbouring countries, all of them, except perhaps Bethlehem, Nazareth, and Old Jerusalem. Not a single village or a single tribe must be left. And the transfer must be done through their absorption in Iraq and Syria and even in Transjordan. For that goal, money will be found—even a lot of money. And only then will the country be able to absorb millions of Jews and a solution will be found to the Jewish question. There is no other solution."
Memorandum from the 1948 "transfer committee": The exodus of the Arabs beyond the boundaries of the state of Israel was not from the start an impossible occurrence and its occurence is not among the surprises that have never been predicted….On the contrary, much had been said about such a possibility, which has come out of planned considerations, in recent years, as a solution to the problem of the whole Land of Israel