Contradiction with Matthew 28:19
This verse instructs to baptize in the name of the Father, Son, and Holy Ghost, whereas Acts 8:12 mentions only the name of Jesus Christ.
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 John 3:16
This verse emphasizes belief in Jesus for eternal life, which could be seen as contradictory to requiring baptism mentioned in Acts 8:12.
John 3:16: For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Contradiction with Ephesians 2:8-9
This verse highlights salvation by grace through faith, not works, while Acts 8:12 involves the action of baptism.
Ephesians 2:8-9: For by grace are ye saved through faith; and that not of yourselves: [it is] the gift of God:
Contradiction with 1 Corinthians 1:17
Paul states Christ did not send him to baptize, implying a lesser emphasis on baptism, contrary to Acts 8:12's focus on baptism.
1 Corinthians 1:17: For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect. [words: or, speech]