This article is based on Psalm 79, a Psalm of Asaph. This was written after the destruction of Jerusalem by the Babylonians. Without a doubt, this was a very traumatic and important event in the Jewish people, so it is described about four times in the Old Testament (2 Kings 25, 2 Chronicles 36: 11-21, Jeremiah 39: 1-14, and Jeremiah 52).
This psalm is also an expression on the part of the psalmist because of the frustration and humiliation of what happened. Think of something, the people of Israel had seen multiple victories against their enemies, and it all began in Egypt, when all the nations realized the might of the God of Israel, but now the temple of the Lord had been desecrated and the city destroyed.
However, a difficult moment, a moment of shame, was never enough for a true worshiper to stop recognizing his purpose. That is why the psalmist wrote at the end of this psalm:
So we thy people and sheep of thy pasture will give thee thanks for ever: we will shew forth thy praise to all generations.