Taqiyya: (Deception, Lying and Taqiyya)

......is an Islamic term referring to precautionary dissimulation or denial of religious belief and practice in the face of persecution.
Muslim scholars teach that Muslims should generally be truthful to each other, unless the purpose of lying is to "smooth over differences."
There are several forms of lying to non-believers that are permitted under certain circumstances, the best known being taqiyya. These circumstances are typically those that advance the cause of Islam - in some cases by gaining the trust of non-believers in order to draw out their vulnerability and defeat them.

Quran (16:106) - Establishes that there are circumstances that can "compel" a Muslim to tell a lie.
Quran (3:28) - This verse tells Muslims not to take those outside the faith as friends, unless it is to "guard themselves" against danger, meaning that there are times when a Muslim should appear friendly to non-Muslims, even though they should not feel that way..
Quran (2:225) - "Allah will not call you to account for thoughtlessness in your oaths, but for the intention in your hearts"

Taken collectively these verses are interpreted to mean that there are circumstances when a Muslim may be "compelled" to deceive others for a greater purpose.