Two sensitive South African Jews who, appalled at the discrimination against the Blacks by the White rulers under Apartheid  migrated to their holy land - Israel. Within two weeks they returned (independently of each other), both bewailing the plight of the colonised Palestinians. They both testified to the fact that the Palestinians were more unjustly and brutally treated by the Jews than were the people of "colour" in South Africa.

One of the above Jews bemoaned the biggest joke in Israel. If you ask any Jew in Israel, "Who gave you Palestine?" Without the slightest hesitation everyone will reply "GOD!". (They have all programmed themselves with the idea of Genesis 17:7). That is God Almighty who had given Palestine to the Jews, but over 75% of the Israeli Jews if questioned, "Do you believe in God?" They immediately respond with "NO!" Yet these atheist and agnostic Jews falsely use God's name for their usurpation of the land of the Palestinians.

"And I will give you (meaning Abraham), and the seed after you, the land where you are a stranger, all the land of Canaan (Palestine), for an everlasting possession; and I will be their God."  (Genesis 17:7)

God gave us in the Bible a test with which we can ascertain whether a prophecy attributed to Him is actually His Word or not:

"And if you say in your heart, how shall we know the word which the Lord has not spoken? When a prophet speaks in the name of the Lord, if the thing does not take place or come true, that is the thing the Lord has not spoken, but the Prophet has spoken it presumptuously, you shall not be afraid of him."  (Deuteronomy 18:21)

The Bible testifies about God's unfulfilled promises to Abraham and the elders of Israel in these words:

"These all died in faith, not having received the promises, but having seen them afar off."  (Hebrews 11:13)

And what could be more explicit than: "And he (God) gave him (Abraham) no inheritance in it, not even a foot of ground, yet he promised that he would give it to him for possession, and to his seed after him."  (Acts 7:5)

The conclusion...

...is that the Jewish "Holy Title Deed" to Palestine is invalid by the fact  that Abraham died without receiving the Promise, thus God could never have made such a promise.