I'm reading  "God's Glory in Salvation through Judgment: A Biblical Theology."

The main message in the book tells that throughout redemptive history, God has shown us a pattern.

Man sins, God judges, God redeems His people.

Only after judgement, can salvation come.  Without judgement, why do we need salvation at all?

Only through judgement can God's holiness shine, can salvation come, can the remnant be redeemed.