Muslims are encouraged to lie to unbelievers in order to defeat them.
There are two forms:
Taqiyya - Lying OUTRIGHT to conceal islam's true intent of global domination.
Kitman - Lying by omission. An example would be when Muslim apologists quote only a fragment of verse 5:32 (that if anyone kills "it shall be as if he had killed all mankind") while neglecting to mention that the rest of the verse (and the next) mandate murder in undefined cases of corruption and mischief and death to all apostates and unbelievers.
Tawriya - Intentionally lying.
Muruna - Hiding the bloody hand of islam behind flowery phrases such as..'Religion of Peace...'
The pedophile, murder, thief and liar muhammad often used deception. Such, as when he signed a 10-year treaty with the Meccans that allowed him access to their city while he secretly prepared his own forces for a blood thirsty takeover. The trusting residents were slaughte4rde and enslaved after the two-faced, lying, pedophile muhammad broke the treaty two years later.
Another example of lying is when muhammad used deception to trick his personal enemies into letting down their guard and exposing themselves to savagery by pretending to seek peace. This happened in the case of Ka'b bin al-Ashraf and again later against Usayr ibn Zarim, a surviving leader of the Banu Nadir tribe, which had been evicted from their home in Medina by the Muslims.
At the time, Usayr ibn Zarim was attempting to gather an armed force against the muslims from among a tribe allied with the Quraish (against which Muhammad had already declared war). Muhammad's "emissaries" went to ibn Zarim and persuaded him to leave his safe haven on the pretext of meeting with the pedophile mummahd in Medina to discuss peace. Once vulnerable, the leader and his thirty companions were massacred by the muslims with ease, because they having erroneously believed that muhammad was a man of his word, were unarmed. They had been assured by muhammad himself of a guarantee of safe passage (Ibn Ishaq 981).
Such was, and is, the reputation of muslims for lying, thieving and casual killing that even those who "accepted Islam" never feel entirely safe.
Consider the fate of the Jadhima. When Muslim "missionaries" approached their tribe, one of the members insisted that they would be slaughtered even though they had already "converted" to Islam to avoid just such a demise. However, the others believed they could trust the muslim leader's promise that they would not be harmed if they simply offered no resistance. (After convincing the skeptic to lay down his arms, the unarmed men of the tribe were quickly tied up and beheaded - Ibn Ishaq 834 & 837).
Today's muslims often try to justify muhammad's murder of those who criticized him at Medina by falsely claiming that they broke a treaty with their actions. Yet, these same apologists place little value on treaties broken by muslims the world over. From Muhammad to Saddam Hussein, promises made to non-muslim are distinctly non-binding in the muslim mindset. So, the religion of blood created by the lips of an pedophile, murder, thief and idolater is not worth the parchment it's written upon.