Several ulema believe deceit is integral to the waging of war: Ibn al-'Arabi declares that "in the Hadith [sayings and actions of Muhammad], practicing deceit in war is well demonstrated. Indeed, its need is more stressed than the need for courage." Ibn al-Munir (d. 1333) writes, "War is deceit, i.e., the most complete and perfect war waged by a holy warrior is a war of deception, not confrontation, due to the latter's inherent danger, and the fact that one can attain victory through treachery without harm [to oneself]." And Ibn Hajar (d. 1448) counsels Muslims "to take great caution in war, while [publicly] lamenting and mourning in order to dupe the infidels."[14]
A long read but a worthwhile insight into Taqiyya, the islamic rules of war.
http://www.meforum.org/2538/taqiyya-islam-rules-of-war
A long read but a worthwhile insight into Taqiyya, the islamic rules of war.
http://www.meforum.org/2538/taqiyya-islam-rules-of-war