Contradiction with 1 Samuel 8:7
The Israelites rejected God as their king, wanting a human king instead, which contradicts them being God's people in a direct relationship as stated in Jeremiah 32:38.
1 Samuel 8:7: And the LORD said unto Samuel, Hearken unto the voice of the people in all that they say unto thee: for they have not rejected thee, but they have rejected me, that I should not reign over them.
Contradiction with Hosea 1:9
God refers to Israel as "not my people," contradicting Jeremiah 32:38 where they are affirmed as God's people.
Hosea 1:9: Then said [God], Call his name Loammi: for ye [are] not my people, and I will not be your [God]. [Loammi: that is, Not my people]
Contradiction with Ezekiel 39:23-24
This passage speaks of the Israelites being scattered and God hiding His face due to their iniquities, which contradicts the promise of perpetual relationship in Jeremiah 32:38.
Ezekiel 39:23-24: And the heathen shall know that the house of Israel went into captivity for their iniquity: because they trespassed against me, therefore hid I my face from them, and gave them into the hand of their enemies: so fell they all by the sword.
Contradiction with Matthew 21:43
Jesus says the kingdom of God will be taken from Israel and given to another people, contradicting the promise of an eternal people-God relationship in Jeremiah 32:38.
Matthew 21:43: Therefore say I unto you, The kingdom of God shall be taken from you, and given to a nation bringing forth the fruits thereof.
Contradiction with Romans 11:25
Paul discusses a partial hardening of Israel until the full number of the Gentiles comes in, suggesting a break in the direct relationship described in Jeremiah 32:38.
Romans 11:25: For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. [blindness: or, hardness]