By whom exactly? And if your answer is God, read Romans 11. The Israelites ceased being God's chosen people when they rejected teh Messiah, who established a New Covenent that supercedes the Old.
You have been reading far too many Muslim rags evidently. The British Empire re-established a homeland for the Jews, they had the authority to do so as they had conquered all that land. The Jews went into the land that was established as theirs and bought out those Arabs that claimed, without any proof in many cases at inflated prices.
As far as Jericho, Ramallah, Gaza, the West Bank goes those belong to Isreal by conquest just as much as the land previously belonged to Britian. The one strong enough to hold the land, owns the land, it has been thus since the dawn of man, or didn't you know that?
The error Israel made was in allowing anyone besides Israelies to remain there. Now it's time to toss the rabble out. And the international community should back off and shut it's pie hole until this is accomplished.
You are wrong about the so called New Covenent.. For one thing God's covenent has never changed.. The old covenent is still in effect, as for the New Covenent is was made by God through Jesus Christ to include the gentile.. not to exclude the Jew.. read "Romans 11: 25 through 32...God's Covenents both old and new are errevocable! Paul is teaching the converted Gentiles about the covenent In Romans 11:vs25.. He says: " I do not want you to be ignorant of the mystery, ( pertaining to the grafting of the Gentile to the natural tree i.e.Israel), so that you may not be conceited: Israel has experienced a hardening in part until the full number of Gentiles has come in.. And so all Israel will be saved, as it is written".
I taught the Covenents on many levels over the years..Just so you will know the New Covenent was formed between God and the Gentile.. (see) Romans11:11.... This was how the Gentile was to be excepted as the children of God, only through the shed blood of Jesus Christ.. God knew that some of the Jews would not accept the Messiah that was preordained. Don't ever think for one minute that God has turned his back on Israel, that will never happen.. God has always gathered them up and brought them through even if only in remnants... God never slumbers nor sleeps, nor shall HIS hand be taken away from Israel, nor shall HIS foot be moved". God will never walk away from Israel.. God does not change his covenents.. only man changes covenents..