Contradiction with Genesis 1:31
Luke 20:9 depicts tenants as evil, whereas this verse states that everything God made was very good.
Genesis 1:31: And God saw every thing that he had made, and, behold, [it was] very good. And the evening and the morning were the sixth day. [And the evening...: Heb. And the evening was, and the morning was etc.]
Contradiction with Matthew 5:9
Luke 20:9 involves conflict, while this verse blesses peacemakers.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with John 3:16
Luke 20:9 involves judgment and punishment, but this verse speaks of love and salvation.
John 3:16: For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Contradiction with James 1:19-20
Luke 20:9 shows anger and violence, whereas these verses promote listening and controlling anger.
James 1:19-20: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Exodus 20:13
Luke 20:9 involves violent acts, contradicting the commandment not to kill.
Exodus 20:13: Thou shalt not kill.
Contradiction with Romans 12:19
Luke 20:9 shows vengeance, but this verse says vengeance belongs to God.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.