Contradiction with Matthew 3:11
Both verses involve John the Baptist speaking about one coming after him who will baptize with the Holy Ghost, but Matthew emphasizes the aspect of fire more prominently.
Matthew 3:11: I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and [with] fire:
Contradiction with John 1:26-27
John the Baptist emphasizes his role but downplays his ability compared to who is coming after him, creating a perceived inconsistency in the authority described.
John 1:26-27: John answered them, saying, I baptize with water: but there standeth one among you, whom ye know not;
Contradiction with Acts 1:5
Jesus explains that John baptized with water, but believers will be baptized with the Holy Ghost not many days after, suggesting a different understanding of baptism timing and mechanism.
Acts 1:5: For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence.
Contradiction with 1 Corinthians 1:14-17
Paul mentions he is thankful he did not baptize many, implying a lesser importance on water baptism compared to the Spirit's work, contrasting the focus of Luke 3:16.
1 Corinthians 1:14-17: I thank God that I baptized none of you, but Crispus and Gaius;
Contradiction with Acts 19:4-6
Paul baptizes in the name of the Lord Jesus and the Holy Ghost comes upon them after laying on of hands, showing a separate process from water baptism.
Acts 19:4-6: Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.