Contradiction with Ezekiel 18:23
God expresses no pleasure in the death of the wicked, contradicting the notion of utter destruction in Jeremiah 12:17.
Ezekiel 18:23: Have I any pleasure at all that the wicked should die? saith the Lord GOD: [and] not that he should return from his ways, and live?
Contradiction with 2 Peter 3:9
God is described as patient, not willing that any should perish, which contrasts with the swift judgment in Jeremiah 12:17.
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 Matthew 5:44-45
Jesus instructs to love enemies, which contrasts with the destruction of those who do not hearken in Jeremiah 12:17.
Matthew 5:44-45: 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 Romans 11:32
God has consigned all to disobedience that He may have mercy on all, contrasting with no mercy in Jeremiah 12:17.
Romans 11:32: For God hath concluded them all in unbelief, that he might have mercy upon all. [concluded...: or, shut them all up together]
Contradiction with Jonah 3:10
God relented from bringing disaster when Nineveh repented, contradicting the assured destruction if not hearkened in Jeremiah 12:17.
Jonah 3:10: And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did [it] not.