Many of the prayers we meet with of this kind are more to be considered in the form of prophecy, than of imprecation: they meant to say that God will pour out the vials of his wrath upon prayerless persons and families, agreeably to his divine declaration, Psalms 11:6.
Related Commentaries of Psalms 79:6
Psalms 79:6-7
6 Pour out thy wrath upon the heathen that have not known thee, and upon the kingdoms that have not called upon thy name.
7 For they have devoured Jacob, and laid waste his dwelling place.