Whatever those fellows do or try to do with reference to the state of Israel, they are in for a great surprise. In the Bible (for those who are believers) the Book of Genesis (Gen 15:18) says " In the same day the LORD made a covenant with Abram, saying, Unto thy seed have I given this land, from the river of Egypt unto the great river, the river Euphrates:"
When God makes a promise or covenant, he means what he says -- he does not break a covenant.
So whatever happens in the future, the Jews are not going to lose their land.
Which includes a good many Arabs (decendants of Ishmael), too. I'm no defender of anyone's presumed bithrights to anything over there since each nation has broken its covenants with God, but what I say is simply a statement of fact vis a vis the promise to Abram.