Contradiction with Psalm 30:5
While Isaiah 54:7 mentions a brief forsaking, Psalm 30:5 suggests that God's favor is for life and his anger but for a moment.
Psalm 30:5: For his anger [endureth but] a moment; in his favour [is] life: weeping may endure for a night, but joy [cometh] in the morning. [his anger...: Heb. there is but a moment in his anger] [for a night: Heb. in the evening] [joy: Heb. singing]
Contradiction with Deuteronomy 31:6
Isaiah 54:7 speaks of God forsaking briefly, but Deuteronomy 31:6 asserts that God will not leave or forsake.
Deuteronomy 31:6: Be strong and of a good courage, fear not, nor be afraid of them: for the LORD thy God, he [it is] that doth go with thee; he will not fail thee, nor forsake thee.
Contradiction with Hebrews 13:5
Whereas Isaiah 54:7 talks about God hiding His face for a moment, Hebrews 13:5 assures that God will never leave or forsake.
Hebrews 13:5: [Let your] conversation [be] without covetousness; [and be] content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.
Contradiction with 1 Samuel 12:22
Isaiah 54:7 indicates a temporary forsaking, yet 1 Samuel 12:22 states that the Lord will not forsake His people for His great name's sake.
1 Samuel 12:22: For the LORD will not forsake his people for his great name's sake: because it hath pleased the LORD to make you his people.
Contradiction with Matthew 28:20
In contrast to a momentary forsaking in Isaiah 54:7, Matthew 28:20 emphasizes God's continuous presence, "lo, I am with you always."
Matthew 28:20: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, [even] unto the end of the world. Amen.