Galatians 5:2
Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.
[KJV]
This doesn't include, jews who are circumcised, then join the Covenant of Faith, [Christ, it means, those who choose to circumcise themselves, or presumably practice circumcision, [de facto choice of circumcision.
Galatians 5:3
For I testify again to every man that is circumcised, that he is a debtor to the whole law.
[KJV]
The blessed Apostle Paul, relates circumcision, to the law, not the Covenant of Faith, unto Abraham[Christ, unto the Gentiles.
Do you believe that the Apostle Paul, is contradicting himself? If circumcision is part of the Covenant of faith, unto Abraham, and the Gentiles, then why does he say that Christians who practice Circumcision, aren't in the Covenant of Faith, but are debtors, to the whole law?