By faith Christians follow a person, trusting in his character and deeds, not a Law which served only to show how inadequate we are as human beings to follow any Law, be it administered by Kings or angels.
This stepping away from following the Law of Moses to following the person of Jesus Christ as the path to righteousness was seen as heresy by many within Judaism. It took the Law, which was revered, and made it obsolete – its purpose fulfilled, which is good, but once fulfilled – obsolete. This did not go down well with some and it caused confusion in the early church which was still working out its relationship with their cultural and spiritual past to Judaism.
There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus. If you belong to Christ, then you are Abraham’s seed, and heirs according to the promise.