This jives with what a Muslim woman told me when I asked why so many of them lied to me - she said "It's because you're a woman. And because they can." She told me that they are free to lie to anyone that they don't feel deserves their truth or to protect Islam, which is a pretty broad category - to protect Islam.
I'm not really certain this is correct, given the many forms of lying that is allowed in Islam, as shown in Betsy's post. Is this what "the religion" says, or is this just your interpretation of the verse? Becasue it seems there is not a lot of consensus in Islam as to what the correct interpretation of verses are, and all are free to interpret any scripture however they want.
For instance, the wife-beating we were talking about yesterday - there are many, many interpretations of what that would involve, from a "light tapping" described on one site, to actual hitting with a stick (some websites say they are not to draw blood with the beatings, others say it's okay if the woman is especially disobedient.) They DO all seem to agree that smacking your wife is perfectly acceptable in Islam. There is certainly nothing that says they should never strike their wives.
I would guess it's the same with lying to infidels. There doesn't seem to be a real consesnsus on what, how, and why lying would be permissible.
It's nice that Dialamah's interpretations are benign, but to say that her above statement RE: lying to infidels, is official Islamic policy is disingenuous, IMO.