The Jewish people, as a NATION, lost their national status in the year 586 BCE. After that, Jerusalem was conquered again and again and again and again...by ALL the different warring leaders of the area. But they were not an official nation after the reign of King Solomon. They became known as "wandering Jews". They settled all over the world, trying to establish homes for themselves.
"Between 1896 and 1948, hundreds of thousands of Jews resettled from Europe to what was then British-controlled Palestine, including large numbers forced out of Europe during the Holocaust."
"Many Arabs saw the influx of Jews as a European colonial movement, and the two peoples fought bitterly. The British couldn’t control the violence, and in 1947 the United Nations voted to split the land into two countries. Almost all of the roughly 650,000 Jews went to the blue territory on the map to the right, and a majority of the Arab population (roughly twice the size of the Jewish community) went to the orange."
"The Jewish residents accepted the deal. The Palestinians, who saw the plan as an extension of a long-running Jewish attempt to push them out of the land, fought it. The Arab states of Egypt, Jordan, Iraq, and Syria all later declared war on Israel, as well (albeit not to defend the Palestinians)."
"Israeli forces defeated the Palestinian militias and Arab armies in a vicious conflict that turned 700,000 Palestinian civilians into refugees. The UN partition promised 56 percent of British Palestine for the Jewish state; by the end of the war, Israel possessed 77 percent — everything except the West Bank and the eastern quarter of Jerusalem (controlled by Jordan), as well as the Gaza Strip (controlled by Egypt). It left Israelis with a state, but not Palestinians."
https://www.vox.com/2018/11/20/18080016/israel-zionism-war-1948
At this point, because the UN created this problem, and because the Israelis have encroached on land promised to the Palestinians in the original adjudication, the UN needs to step in and settle this.
However, the Israelis are a stubborn and stiff necked people, and I doubt very much that they will return any of the land they stole.
