Contradiction with Matthew 10:34
While 2 Corinthians 6:3 emphasizes avoiding giving offense, Matthew 10:34 speaks of Jesus bringing division rather than peace, which may inherently cause offense.
Matthew 10:34: Think not that I am come to send peace on earth: I came not to send peace, but a sword.
Contradiction with Galatians 5:11
Paul mentions enduring persecution for preaching the cross, which implies causing offense, contrasting with the idea in 2 Corinthians 6:3 of not causing offense.
Galatians 5:11: And I, brethren, if I yet preach circumcision, why do I yet suffer persecution? then is the offence of the cross ceased.
Contradiction with 1 Corinthians 1:23
Preaching Christ crucified is described as a stumbling block to some, directly contradicting the intent of not giving offense in 2 Corinthians 6:3.
1 Corinthians 1:23: But we preach Christ crucified, unto the Jews a stumblingblock, and unto the Greeks foolishness;
Contradiction with Matthew 15:12
Jesus' teachings offended the Pharisees, contrasting with the principle of avoiding offense in 2 Corinthians 6:3.
Matthew 15:12: Then came his disciples, and said unto him, Knowest thou that the Pharisees were offended, after they heard this saying?
Contradiction with John 6:61
Jesus acknowledges his disciples are offended by his teachings, which contrasts with the message of avoiding giving offense in 2 Corinthians 6:3.
John 6:61: When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you? [offend: or, scandalize, or, cause you to stumble]