Contradiction with Acts 9:26
Acts 9:26 describes Paul trying to join the disciples, but they were afraid and did not believe he was a disciple, which contrasts with the acceptance depicted in Acts 9:27.
Acts 9:26: And when Saul was come to Jerusalem, he assayed to join himself to the disciples: but they were all afraid of him, and believed not that he was a disciple.
Contradiction with Acts 22:4
This verse highlights Paul's past persecution of Christians, which is contrary to the trust and acceptance from Barnabas found in Acts 9:27.
Acts 22:4: And I persecuted this way unto the death, binding and delivering into prisons both men and women.
Contradiction with Galatians 1:18-19
Paul mentions only seeing Peter and James during this visit to Jerusalem, which contradicts the broader acceptance suggested by Barnabas in Acts 9:27.
Galatians 1:18-19: Then after three years I went up to Jerusalem to see Peter, and abode with him fifteen days. [went up: or, returned]
Contradiction with Acts 26:10-11
These verses emphasize Paul's previous active role in persecuting Christians, which contradicts the immediate acceptance he receives in Acts 9:27.
Acts 26:10-11: Which thing I also did in Jerusalem: and many of the saints did I shut up in prison, having received authority from the chief priests; and when they were put to death, I gave my voice against [them].