Contradiction with Matthew 5:18
While Jeremiah 31:36 suggests the permanence of God's decrees, Matthew 5:18 indicates that not a jot or tittle will pass from the law, emphasizing its unchangeable nature, not emphasizing the conditionality based on Israel's actions.
Matthew 5:18: For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
Contradiction with Romans 11:29
Jeremiah 31:36 speaks of a conditional promise, whereas Romans 11:29 states that God's gifts and calling are irrevocable, suggesting an unconditional promise to Israel.
Romans 11:29: For the gifts and calling of God [are] without repentance.