Contradiction with Exodus 20:13
Judges 18:15 leads to violence, while Exodus 20:13 commands not to kill.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 7:12
Judges 18:15 involves invading a home, conflicting with this verse's ethic of reciprocity.
Matthew 7:12: Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets.
Contradiction with Romans 13:1-2
The actions in Judges 18:15 defy the governing authority and order praised here.
Romans 13:1-2: Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God. [ordained: or, ordered]
Contradiction with Proverbs 3:29
Judges 18:15 depicts a scheme against a neighbor despite this proverb's call for peace.
Proverbs 3:29: Devise not evil against thy neighbour, seeing he dwelleth securely by thee. [Devise...: or, Practise no evil]
Contradiction with Luke 6:31
The invasion of Micah's home in Judges 18:15 opposes doing to others as you would have them do to you.
Luke 6:31: And as ye would that men should do to you, do ye also to them likewise.