Unfortunately, you have bought into the Zionist propaganda.
These are the facts:
1. Iran was not of the countries that took part or assisted the Palestinian in its civil war in 1948. In fact,
Iran was the ONLY Middle Eastern country to provide Israel with oil during those years, enabling it to survive.2.
The war of 1948 was a civil war. Where one side, the Palestinian were supported and in some cases, led by "foreign entities" like Egypt, Jordan, Saudi Arabia, Lebanon, Syria, Yemen and Iraq - and on the other side, the Zionist Palestinian were supported by the Jewish Agency ( a foreign entity) who had pumped money and weapons since 1945 under Plan Dalet. You can google and look up Plan Dalet.
3. The UN partition plan came about because the Palestinian Zionists did not want or accept just a "Home" within Palestine. They wanted a State of their own, hence Plan Dalet. Its why they attacked the British soldiers, Arab Palestinian and UN peace negotiators, look up assassination of Folke Bernadotte by Lehi.
4.
The UN partition plan under UNGA, was just a Recommendation, Not an International Law. What should follow, should have been a referendum on whether the people living within Palestine wanted to separate into two States. But the Palestinian Zionists declared a State hence triggering the Civil War. Note, the Zionists who declared a separate State, DID NOT accept the 1948 borders as recommended by UN partition plan.
Here are some of Ben Gurion's quotes at the time:
“If I were an Arab leader, I would never sign an agreement with Israel. It is normal; we have taken their country. It is true God promised it to us, but how could that interest them? Our God is not theirs. There has been Anti-Semitism, the Nazis, Hitler, Auschwitz, but was that their fault? They see but one thing: we have come and we have stolen their country. Why would they accept that?”
David Ben-Gurion (the first Israeli Prime Minister): Quoted by Nahum Goldmann in Le Paraddoxe Juif (The Jewish Paradox), pp121.
“Let us not ignore the truth among ourselves … politically we are the aggressors and they defend themselves… The country is theirs, because they inhabit it, whereas we want to come here and settle down, and in their view we want to take away from them their country. … Behind the terrorism [by the Arabs] is a movement, which though primitive is not devoid of idealism and self sacrifice.”
— David Ben Gurion. Quoted on pp 91-2 of Chomsky’s Fateful Triangle, which appears in Simha Flapan’s “Zionism and the Palestinians pp 141-2 citing a 1938 speech.
“We must do everything to insure they (the Palestinians) never do return.”
David Ben-Gurion, in his diary, 18 July 1948, quoted in Michael Bar Zohar’s Ben-Gurion: the Armed Prophet, Prentice-Hall, 1967, p. 157.
Ben Gurion also warned in 1948: Assuring his fellow Zionists that Palestinians will never come back to their homes: “The old will die and the young will forget.”
Partition: “after the formation of a large army in the wake of the establishment of the state, we will abolish partition and expand to the whole of Palestine “— Ben Gurion, p.22 “The Birth of Israel, 1987” Simha Flapan.
These were the goals of the Palestinian Zionists.
5. Finally, Palestine had a Constitution (promulgated in 1922) and a Citizenship order (1925) and all of the Palestinian Zionists who were given sanctuary and a home from the ravages of wars in Europe, were given a Palestinian citizenship and passport. And all had sworn an oath of allegiance to Palestine. They all did - including Gurion, Sharon, Shamir, Golda Meir, including Netanyahu's parents. Refer to below on the Citizenship Order that all Palestinian Zionists had signed.
(a) Oath of Allegiance (Palestinian Citizenship Order 1925)
I__............................... swear by Almighty
God that I will be faithful and loyal to the Government
of Palestine.
(Signed).......................
Sworn and subscribed this___
day of................ before me,
(Signed)
(Title)
do solemnly and
(b) Solemn affirmation.
178 OFFICIAL GAZETTE. 10Lli. September, 1925
Fees.
(Article 19(1) (e)).
16th September, 1925.
sincerely affirm that I will be faithful and loyal to the Government of Palestine.
(Signed)......................................... .....