Contradiction with Ezekiel 18:32
This verse states God takes no pleasure in the death of anyone, suggesting a focus on life, whereas Isaiah 10:23 speaks of the Lord God executing a complete destruction.
Ezekiel 18:32: For I have no pleasure in the death of him that dieth, saith the Lord GOD: wherefore turn [yourselves], and live ye. [yourselves: or, others]
Contradiction with 1 Timothy 2:4
This verse notes God's desire for all men to be saved, which contrasts with the determined end described in Isaiah 10:23.
1 Timothy 2:4: Who will have all men to be saved, and to come unto the knowledge of the truth.
Contradiction with 2 Peter 3:9
This passage mentions God's patience and His wish that none should perish, opposing the decisive destruction in Isaiah 10:23.
2 Peter 3:9: The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Contradiction with John 3:17
The emphasis here is on salvation through Jesus, contradicting the notion of a determined end presented in Isaiah 10:23.
John 3:17: For God sent not his Son into the world to condemn the world; but that the world through him might be saved.