A god who is all love, all grace, all mercy—but no sovereignty, no justice, no holiness, and no wrath—is an idol!
The most violent expression of God's wrath and justice is seen in the Cross. If ever a person had room to complain for injustice it was Jesus. He was the only innocent man ever to be punished by God!
If we stagger at the wrath of God, then let us stagger at the Cross. Here is where our astonishment should be focused.
"God made Him who had no sin to be sin for us, so that in Him we might become the righteousness of God!" - 2 Corinthians 5:21
"Christ redeemed us from the curse of the law by becoming a curse for us!" - Galatians 3:13
"He humbled Himself and became obedient to death—even death on a cross!" - Philippians 2:8
"He Himself bore our sins in His body on the tree!" - 1 Peter 2:24
"Christ died for sins once for all, the righteous for the unrighteous, to bring you to God!" - 1 Peter 3:18