There are efforts to say that when we become Christian or believers in Christ by faith, that then we are of the commonwealth of Israel, subject to the same covenant conditions.
The rebuttal to this argument will demonstrate that this is not true. Other scriptures need to be considered. When one is in Christ, he is married to another, there is a change in the law, there is a better testament, Christ has abolished in his flesh the enmity, even the law of commandments contained in ordinances, and He purposed to reconcile both (Jew and Gentile) unto God in one body by the cross.
See the detail of Graffed In.