Sharia Law – lying (to infidels) is obligatory.

The Quran boasts that Allah is the “master of all scheming” (Quran 13:42) and that he is “profound in his machinations” (Quran 8:30). Islamic Sharia Law provides, “When it is possible to achieve an aim by lying but not by telling the truth, it is permissible to lie if attaining the goal is permissible, and lying is obligatory if the goal is obligatory.”

My comment: You must realize that when dealing with a muslim, he is deceiving you on some level. He can not be entirely truthful with any infidel. It is Islamic law.