They can do this because a person is not a true Jew if he is only a Jew in his physical body; true circumcision is not only on the outside of the body.
When we were baptized, we were buried with Christ and shared his death. So, just as Christ was raised from the dead by the wonderful power of the Father, we also can live a new life.
The Jewish law had many commands and rules, but Christ ended that law. His purpose was to make the two groups of people become one new people in him and in this way make peace.
We are the ones who are truly circumcised. We worship God through his Spirit, and our pride is in Christ Jesus. We do not put trust in ourselves or anything we can do,
The One who was sitting on the throne said, “Look! I am making everything new!” Then he said, “Write this, because these words are true and can be trusted.”