'Demonstrate' in the Bible
God presented Him as a propitiation through faith in His blood, to demonstrate His righteousness, because in His restraint God passed over the sins previously committed.
God presented Him to demonstrate His righteousness at the present time, so that He would be righteous and declare righteous the one who has faith in Jesus.
For the Scripture says about Pharaoh, "I have raised you up for this very purpose, to demonstrate my power through you and that my name might be proclaimed in all the earth."
Now if God wants to demonstrate his wrath and reveal his power, can't he be extremely patient with the objects of his wrath that are made for destruction?