From history:
"During the Spanish inquisition, Sunni Moriscos attended mass and returned home to wash their hands of the ‘holy water’. In operational terms, taqiyya and kitman allowed the ‘mujahadeen ’ to assume whatever identity was necessary to fulfill their mission; they had doctrinal and theological and later jurisprudential sanction to pretend to be Jews or Christians to gain access to Christian and Jewish targets: ‘the mujahadeen can take the shape of the enemy’."And
"Al Taqiyya is with tongue only; not the heart. A believer can make any statement as long as the ‘heart is comfortable'. The 9/11 terrorists lived and visited in the United States for two years before the 9/11 attacks. How did they acculturate? By the use of taqiyya. Meaning: I hate you but I smile at you-in public."A Christian should know better than to try to justify any lie. Jesus said that the devil "was a liar and a murderer from the beginning and there is no truth in him."
Learn some more here.
Tradecraft. Persona. Deception. Disinformation. Cover: Western operational terms and techniques. But, Islamic terrorists have their own terms: taqiyya (pronounced tark-e-ya) : precautionary dissimulation or deception and keeping one’s convictions secret and a synonymous term, kitman: mental reservation and dissimulation or concealment of malevolent intentions...
Taqiyya and kitman or ‘holy hypocrisy’ has been diffused throughout Arabic culture for over fourteen hundred years since it was developed by Shiites as a means of defence and concealment of beliefs against Sunni unbelievers. As the Prophet said: 'he who keeps secrets shall soon attain his objectives.’
The skilful use of taqiyya and kitman was often a matter of life and death against enemies; it is also a matter of life and death to many contemporary Islamic terrorists. As so often in the history of Islam, a theological doctrine became operational.
During the Spanish inquisition, Sunni Moriscos attended mass and returned home to wash their hands of the ‘holy water’. In operational terms, taqiyya and kitman allowed the ‘mujahadeen ’ to assume whatever identity was necessary to fulfill their mission; they had doctrinal and theological and later jurisprudential sanction to pretend to be Jews or Christians to gain access to Christian and Jewish targets: ‘the mujahadeen can take the shape of the enemy’.
Taqiyya is common to both Shiite and Sunni Muslim discourse and has significant implications for understanding Islamic fundamentalism and terrorist operations. The theory and practice of counter terrorism would be counter productive, indeed pointless, and even harmful, without reference to taqiyya and kitman and the crucial role of deception ranging from Islamic jurisprudence to Al Qaeda training manuals, which carry detailed instructions on the use of deception by terrorists in Western target countries.
According to Christian ethics lying is a sin; In Islamic jurisprudence and theology, the use of taqiyya against the unbelievers is regarded as a virtue and a religious duty.