Contradiction with John 3:16
Promises everlasting life through belief in Jesus, whereas Zephaniah 1:17 depicts judgment on people.
John 3:16: For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Contradiction with Romans 5:20
Talks about grace abounding, which contrasts with the punishment described in Zephaniah 1:17.
Romans 5:20: Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound:
Contradiction with Isaiah 1:18
God offers forgiveness and reason, which seems to contradict the severity shown in Zephaniah 1:17.
Isaiah 1:18: Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
Contradiction with Psalm 103:8
Describes God as merciful and gracious, slow to anger, in contrast to the wrath in Zephaniah 1:17.
Psalm 103:8: The LORD [is] merciful and gracious, slow to anger, and plenteous in mercy. [plentious...: Heb. great in mercy]
Contradiction with Ezekiel 18:23
Expresses God's preference for the wicked to repent and live, not simply face punishment as in Zephaniah 1:17.
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?
Paradox #1
The doctrinal conflict might arise from the depiction of God's judgment and wrath, which can be seen as inconsistent with the New Testament teachings of love and forgiveness through Jesus. In some interpretations, the harsh punishment mentioned may seem at odds with a loving and merciful God.