A vision of absolute hope emerges at the close of the psalm, contrasting God's eternal rule with the fleeting power of evil. The ultimate downfall of wicked nations is closely connected to the timeless nature of divine kingship.
The primary approach among commentators is that a direct relationship exists between the revelation of God's eternal kingship and the defeat of those who oppose Him. God's reign will become fully visible to the world specifically when He executes justice against the wicked forces that deny Him and oppress the Israelites in exile. Only when these corrupt nations are removed will His absolute authority be universally recognized [רש״י, רד״ק, מאירי, ביאור שטיינזלץ]. Viewed through this lens, the prayers of the Israelites during their exile go far beyond a simple plea for relief from personal suffering. Their core request is for the revelation of God's kingdom on earth. Once His rule is made clear and the oppressive nations fall, complete redemption will naturally follow. Control will return to the Israelites, and the entire world will be acknowledged as God's domain [רד״ק, אלשיך].
Offering a different perspective, another interpretation focuses on the fundamental difference between divine and mortal rule. A human king relies entirely on his people; if his subjects are destroyed, his kingdom ceases to exist. God's reign, however, is eternal and stands entirely on its own. He remains the eternal King even if nations sin and face total destruction, because His absolute authority does not depend on the existence of subjects [מלבי״ם].
Finally, this declaration of kingship can be understood as a prayer built upon the precedents of history. Because God's power and rule never change, the plea recalls how wicked nations were punished and removed from the land in the past. Relying on His unchanging nature, the prayer asks God to apply that same standard of strict justice to the present day, calling for the removal of contemporary forces of evil [מצודת דוד].