Hell glorifies God because:
1. It shows that He keeps His Word.
2. It shows His infinite worth, lasting forever.
3. It demonstrates His power to subdue all who rebel against Him.
4. It shows how unspeakably merciful He is to those who trust Him.
5. It upholds the reality of love by visiting justice against those who reject God, who is love.
6. It vindicates all who suffered to hear or proclaim the truth of God's Word.
7. It shows the enormity of what Jesus accomplished when He died to save all who would trust Him from the hell they deserved. If there were no hell, there would be no need for the cross.
James Hamilton