Contradiction with Deuteronomy 28:62
This verse talks about being left in few in number due to disobedience, whereas Isaiah 1:9 emphasizes the remnant that is spared.
Deuteronomy 28:62: And ye shall be left few in number, whereas ye were as the stars of heaven for multitude; because thou wouldest not obey the voice of the LORD thy God.
Contradiction with Romans 9:27
This verse mentions that only a remnant shall be saved, in contrast to Isaiah 1:9 which suggests the need for a spared remnant for survival.
Romans 9:27: Esaias also crieth concerning Israel, Though the number of the children of Israel be as the sand of the sea, a remnant shall be saved:
Contradiction with Jeremiah 15:6
This verse describes God as weary of relenting and ready to destroy, opposite to Isaiah 1:9 where destruction is spared by God’s mercy.
Jeremiah 15:6: Thou hast forsaken me, saith the LORD, thou art gone backward: therefore will I stretch out my hand against thee, and destroy thee; I am weary with repenting.