Oh really?!?

Some Jewish organisations also opposed the proposal. Irgun leader Menachem Begin announced, “The partition of the Homeland is illegal. It will never be recognised. The signature by institutions and individuals of the partition agreement is invalid. It will not bind the Jewish people. Jerusalem was and will forever be our capital. Eretz Israel will be restored to the people of Israel. All of it. And for ever.”

During the foundational events of the Nakba in 1948, dozens of massacres targeting Arabs were conducted and over 500 Arab-majority towns and villages were depopulated,[8] with many of these being either completely destroyed or repopulated by Jews and given new Hebrew names. Approximately half of Palestine’s predominantly Arab population, 750,000 people,[9] fled from their homes or were expelled by Zionist militias and later the Israeli army in what is now Israel proper, which covers 78% of the total land area of the former Mandatory Palestine.

Zionists wanted to create a Jewish state in Palestine with as much land, as many Jews, and as few Palestinian Arabs as possible.[17] By the time the British announced their official support for Zionism in the 1917 Balfour Declaration during World War I,[18] the population of Palestine was about 750,000, approximately 94% Arab and 6% Jewish.[19]]

Zionists accepted the partition but planned to expand Israel’s borders beyond what was allocated to it by the UN.[26] In the fall of 1947, Israel and Jordan, with British approval, secretly agreed to divide the land allocated to Palestine between them after the end of the British Mandate.

On 29 November 1947, the General Assembly passed Resolution 181 (II), the “United Nations Partition Plan for Palestine.”[28] At the time, Arabs made up about two-thirds of the population[29] and owned about 90% of the land,[30] while Jews made up between a quarter and a third of the population[31] and owned about 7% of the land.[32] The UN partition plan allocated to Israel about 55% of the land, where the population was about 500,000 Jews and 407,000-438,000 Arabs. Palestine was allocated the remaining 45% of the land, where the population was about 725,000-818,000 Arabs and 10,000 Jews.

Source: https://en.m.wikipedia.org/wiki/Nakba

I think you are the one lacking historical background. And for the record no ethnicity will be happy when 7% of the land holders are getting 55% of the land. Jews got the lion share of the newly established country on what exactly grounds?

I have another question to you, why is Israel denying the expelled Palestinians the right to return?