Contradiction with Matthew 5:43-44
These verses speak about loving your enemies, which contradicts the command to fight against Og in Numbers 21:34.
Matthew 5:43-44: Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.
Contradiction with Exodus 20:13
This verse commands "Thou shalt not kill," which contrasts with being told to slay Og and his people.
Exodus 20:13: Thou shalt not kill.
Contradiction with Romans 12:19
Advises against taking vengeance, which contradicts the action taken in Numbers 21:34.
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.
Contradiction with Proverbs 25:21
Advises feeding your enemy if they are hungry, contrasting the directive for destruction in Numbers 21:34.
Proverbs 25:21: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Luke 6:27
Commands to love your enemies, conflicting with the command to engage in battle as instructed in Numbers 21:34.
Luke 6:27: But I say unto you which hear, Love your enemies, do good to them which hate you,
Paradox #1
The contradiction in this context could be the perceived inconsistency between a loving and merciful deity and the acts of destruction or conquest described. Some might see this as conflicting with values of compassion and forgiveness.