Contradiction with Matthew 10:5-6
Contradicts the notion of preaching to Gentiles as instructed to only go to the lost sheep of Israel.
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 Romans 1:16
States that the gospel is for the Jew first, then the Gentile, implying a different order of preaching.
Romans 1:16: For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
Contradiction with Matthew 28:19
Commands to make disciples of all nations, expanding beyond the specific audience in Acts 11:26.
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 Galatians 2:9
Indicates a division of labor in preaching, with Paul to the Gentiles and Peter to the Jews.
Galatians 2:9: And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we [should go] unto the heathen, and they unto the circumcision.
Contradiction with Acts 15:1
Suggests that some believed circumcision was necessary, contrasting with the inclusive Gentile message in Acts 11:26.
Acts 15:1: And certain men which came down from Judaea taught the brethren, [and said], Except ye be circumcised after the manner of Moses, ye cannot be saved.