Contradiction with Exodus 15:3
This verse describes God as a man of war, which might contradict the notion in Ezekiel 39:21 where God's glory is set among the nations after a victory, seemingly indicating a focus on restoration rather than warfare.
Exodus 15:3: The LORD [is] a man of war: the LORD [is] his name.
Contradiction with 1 John 4:8
This verse states that God is love, which could be seen as contradicting the depiction in Ezekiel 39:21 of God making His power known through judgment.
1 John 4:8: He that loveth not knoweth not God; for God is love.
Contradiction with Psalm 46:9
This verse speaks of God making wars cease, which may contrast with the depiction of divine intervention in battle leading to the display of God's glory in Ezekiel 39:21.
Psalm 46:9: He maketh wars to cease unto the end of the earth; he breaketh the bow, and cutteth the spear in sunder; he burneth the chariot in the fire.
Contradiction with Matthew 5:44
This verse instructs to love your enemies, potentially contradicting the portrayal in Ezekiel 39:21 of the nations witnessing God's judgments after His wrath is executed.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Isaiah 2:4
This verse talks about turning swords into plowshares and nations not learning war anymore, which is at odds with the violent intervention implied in Ezekiel 39:21.
Isaiah 2:4: And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]