Q) I heard some people saying this du’aa’: “O Allaah, deal with the kuffaar and mushrikeen and Jews; O Allaah, do not leave any one of them alive; O Allaah, wipe them out as You wiped out ‘Aad and Thamood.” What is the ruling on such a du’aa’?
A) Praise be to Allaah.
Praying that the kuffaar be wiped out is overstepping the mark in du’aa’, because Allaah has decreed that they should exist and there is a reason for their existence; Allaah does what He wills and rules as He wants.
And Allaah is the source of strength; may Allaah send blessing and peace upon our Prophet Muhammad and his family and companions. End quote.
Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah wa’l-Ifta, 24/276