Contradiction with John 14:6
Jesus states He is the way, the truth, and the life, contradicting "damnable heresies" in 2 Peter 2:2.
John 14:6: Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Contradiction with Galatians 1:8
Paul warns against any gospel contrary to the one preached, conflicting with the idea of many following false ways.
Galatians 1:8: But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
Contradiction with 1 John 4:1
Encourages testing spirits to see if they are from God, opposing the idea of easily being led astray as suggested in 2 Peter 2:2.
1 John 4:1: Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
Contradiction with Matthew 7:14
Speaks of the narrow way leading to life, which few find, contrasting with many following pernicious ways in 2 Peter 2:2.
Matthew 7:14: Because strait [is] the gate, and narrow [is] the way, which leadeth unto life, and few there be that find it. [Because: or, How]
Contradiction with 2 Timothy 4:3-4
Predicts people turning away from sound doctrine, which aligns with 2 Peter 2:2, noting serving different perspectives may show contrast yet parallel reality.
2 Timothy 4:3-4: For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;