Your conclusion is wrong. Allah nowhere unconditionally promised the land of Israel to the Jews, but said that they will have land IF THEY KEEP HIS WORD.
(Exodus 19:5)."Now therefore, IF YOU WILL OBEY MY VOICE INDEED, and KEEP MY COVENANT, then you shall be a peculiar treasure unto me from all the peoples, for all the earth is mine"
Do the Zionist Jews who rule Israel do so using God’s Word? No.
Did God destroy the Jewish kingdom three times, finally in 70AD when Jerusalem and the holy temple was smashed? Yes.
Has God sent the Messiah to reinstate the Jewish land/ temple? No
So according to the Bible the Jews have no right to the land unless and until they return to God and He forgives them.
Your Quranic understanding of the issue is weak. The Quran is equally clear on this when it says that the Jews will only have power/land if thye keep the commandments of God. As they did not, and still do not, then they have no Quranic right to Israel or any other land.
10:93 Thereafter, We assigned to the Children of Israel an honorable dwelling place, and gave them decent provision. But they began to hold divergent views and divided themselves despite the knowledge (of revelation). Your Lord will judge between them on the Day of Resurrection regarding wherein they differed.
5:20 Recall when Moses said, “O My people! Remember God's blessings that He raised Prophets among you and made you your own masters. And He gave you what He had not given to any other people.
5:21 O My people! Enter the Sacred Land that God has decreed for you, AS LONG AS YOU HOLD FAST TO HIS LAWS. BUT, IF YOU TURN BACK IN FLIGHT, YOU WILL BE OVERTHROWN TO YOUR OWN RUIN.”
[Sacred Land = Can’aan = Syria-Palestine, 2:125, 6:137, 12:58, 12:94, 21:71, 23:50, 26:59, 29:26, 30:3, 44:3, Introduction to Surahs: 12, 14, 19]
After this God removed them from Palestine.
The Palestine problem is political not religious and though the jews want to bring in 'promised land' and holocaust, you should at least know what the Quran says and not what you think it says!