And after him We said to the Children of Israel, 'Dwell Ye in the promised land; and when the time of the promise of the Latter Days come, We shall bring you together out of various people." (17:105)
Creation of Israel and gathering of Sephardic, Ashkenazi and the Jews of many other different races in Israel proves the authenticity of this prophecy and hence Quran.
Again, the verse in context:
And certainly We gave Musa nine clear signs; so ask the children of Israel. When he came to them, Firon said to him: Most surely I deem you, O Musa, to be a man deprived of reason. He said: Truly you know that none but the Lord of the heavens and the earth has sent down these as clear proof and most surely I believe you, O Firon, to be given over to perdition. So he desired to destroy them out of the earth, but We drowned him and those with him all together; And We said to the Israelites after him: Dwell in the land: and when the promise of the next life shall come to pass, we will bring you both together in judgment.
And with truth have We revealed it, and with truth did it come; and We have not sent you but as the giver of good news and as a warner.
Additionally, it would appear strange that the Quran would affirm the existence of a nation that Muslim-majority nations frequently deny the existence of.
This has nothing to do with the establishment of Israel; its merely a retelling of Musa (Moses), Firon (Pharaoh) and the Israelites story (Islamic version), as previously related in the Bible.