Isaiah 13:9. “Behold, the day of the Lord cometh, cruel both with wrath and fierce anger, to lay the land desolate: and He shall destroy the sinners thereof out of it.”
Staying in context with the rest of the passage, we’re learning of the Day of the Lord, that time when He returns to earth, the Second Advent, and deals with the peoples and nations of the earth that have rejected Him and persecuted His people.
It is true that God is a God of love; however, His love is set within the boundaries of His holiness, which cannot tolerate sin. His holiness demands that sin be overturned, punished, and cleansed. I believe we have lost sight of the reality of the holiness of God in our focus on His love. His primary attribute is His holiness.
We should fear that. We need to understand that a holy God cannot look on sin.