Contradiction with Matthew 10:5-6
Jesus instructs the disciples not to go to the Gentiles, while Acts 15:30 involves a message being sent to Gentile believers.
Matthew 10:5-6: These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into [any] city of the Samaritans enter ye not:
Contradiction with Galatians 2:11-12
Paul opposes Peter for behaving differently towards Gentiles, contrasting with the unity shown in Acts 15:30.
Galatians 2:11-12: But when Peter was come to Antioch, I withstood him to the face, because he was to be blamed.
Contradiction with Acts 10:28
Peter states it is unlawful for a Jew to associate with a Gentile, whereas Acts 15:30 involves Jewish leaders communicating positively with Gentiles.
Acts 10:28: And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean.
Contradiction with Matthew 28:19
Jesus commands to teach all nations, whereas Acts 15:30 reflects a previous focus on certain rules.
Matthew 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: [teach...: or, make disciples, or, Christians of all nations]
Contradiction with Deuteronomy 23:3
Forbids Ammonites and Moabites from entering the assembly of the Lord, conflicting with the inclusive message to Gentiles in Acts 15:30.
Deuteronomy 23:3: An Ammonite or Moabite shall not enter into the congregation of the LORD; even to their tenth generation shall they not enter into the congregation of the LORD for ever:
Contradiction with Genesis 17:14
Commands circumcision for inclusion in God's people, whereas Acts 15:30 follows the decision not to impose this on Gentiles.
Genesis 17:14: And the uncircumcised man child whose flesh of his foreskin is not circumcised, that soul shall be cut off from his people; he hath broken my covenant.
Contradiction with Exodus 12:48
Requires circumcision for foreigners to celebrate Passover, contradicting the relaxed requirements for Gentiles in Acts 15:30.
Exodus 12:48: And when a stranger shall sojourn with thee, and will keep the passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: for no uncircumcised person shall eat thereof.
Contradiction with Romans 2:17-25
Critiques Jews for relying on the law, contrasting Acts 15 where the law is relaxed for Gentiles.
Romans 2:17-25: Behold, thou art called a Jew, and restest in the law, and makest thy boast of God,