3 Yet not even Titus, who was with me, was compelled to be circumcised, even though he was a Greek. -Galatians 2:3 BSB
This verse gives us the reason why Paul wanted to go back to Jerusalem to speak with “those recognized as leaders” (verse 2). False believers were trying to get genuine believers to go back to the Law like keeping circumcision, which is fulfilled in Christ, who is the One who sets us apart by giving us the Holy Spirit when one puts their faith in Him. See below.
No, a man is a Jew because he is one inwardly, and circumcision is a matter of the heart, by the Spirit, not by the written code. Such a man’s praise does not come from men, but from God. -Romans 2:29 BSB
2 For in Christ Jesus the law of the Spirit of life set you free from the law of sin and death. 3 For what the law was powerless to do in that it was weakened by the flesh, God did by sending His own Son in the likeness of sinful man, as an offering for sin. -Romans 8:2-3 BSB
Jesus Christ kept the Law for us and fulfilled it, but if a believer wants to go back to the Law to keep it, he or she will end up rejecting Jesus’ atoning sacrifice for their sins. The Law instituted animal sacrifice on behalf of the people for their sins, which pointed to the future fulfillment sacrifice of the Son of God, Jesus Christ, on the cross. If we go back to the Law, it’s to say that we have rejected the fulfillment seen in Christ as our sacrificial Lamb for all of our sins.
You who are trying to be justified by the law have been severed from Christ; you have fallen away from grace. -Galatians 5:4 BSB