When the Jews rejected God - Christ Jesus - any promise that had existed was made null and void.   

Carrying this point forward to Eternal Security, though the potential for Christ's Grace is ETERNAL, we must 'endure to the end' Mat 10:22 Mat 24:13 Mar 13:13 in order for His promise to materialize.   

Enduring to the end is remaining true to our commitment of faith and trust in Jesus Christ.   

Should a believer become an unbeliever the contract (relationship) is broken Heb 10:26 .   

We are saved by Grace Through FAITH so losing FAITH is losing salvation.   

DNA-Israel rejected God so God rejected DNA-Israel.   

Therefore say I unto you, The kingdom of heaven shall be taken from you, and given to a nation bringing forth the fruits thereof. Mat 21:43 Israel was rejected as the heirs of the Kingdom because it rejected Christ Jesus whose Kingdom it is.      From the time point that Jesus spoke these Words forward, the Chosen People were not genetic descendants of Abraham, rather the Chosen People are the children of Abraham by Faith.      No Jewish person has been or ever will be accepted by Christ Jesus based    ➛ on their genetics or    ➛ their traditions or    ➛ their Judaism A remnant of genetic Israel will be saved by Grace Through Faith In Christ Jesus.