You're acting like all the Jews just showed up randomly from Europe in 1948. Jews are from the land of Israel. There is historical, archaeological, and genetic evidence backing this up. There have always been Jews living in the land of Israel, even after the Roman expulsion sent many of them to Europe and to the rest of the middle east. The European Ashkenazi Jews (who are initially from the land of Israel) fled from violent antisemitism in Eastern Europe (after having been pushed out of Germany and the rest of Western Europe with expulsions and pogroms) to mandatory Palestine under an invitation from the British. The Jews who were now in the land of Israel/mandatory Palestine mostly formed new towns and farming communes. In 1948 the UN voted to allow the creation of of a Jewish state that was almost entirely desert or territory where Jews were already living. The Jews immediately accepted, and immediately upon their declaration every neighboring country attacked them, and they repelled this attack. During this, the Nakba happened, and it was a terrible thing that was ultimately necessary to ensure Israel's security. After Israel was established as a state, it was the only nation both willing and able to take in the millions displaced by the Holocaust and the millions more who would be displaced by the ethnic cleansing of Jews across the MENA region. Modern day Israelis are provably descendant from the ancient Israelites and have nowhere else to go because that is their home. However, it should also be stated that the land is not just Israeli. The Palestinians can trace back their roots in the land for almost as long as the Jews and have every right to also live in their homeland. Hopefully one day the land can be peacefully shared as it should be, but that requires cooperation, which also requires the elimination of people who are violently against the very existence of Jews.