The most powerful weapon against Islam is Taqiyya

The most powerful propaganda weapon against Islamists is to turn their own Taqiyya against them

The double-edged sword of taqiyya.

Holy lying
Muslims are encouraged to deceive infidels to advance the power of Islam. This deception can take many forms, including outright lies, pretence of 'interfaith cooperation', feigned moderation and condemnation of terrorist attacks to infidels while rejoicing in the carnage with fellow Muslims.

This 'Holy Lying' is known as taqiyya (sometimes spelled taqiya or taquiya). It is holy because it is blessed by both Allah and Mohammed. Allah is 'the best of deceivers' (Koran 3.54), and Muhammad said "War is Deceit"; and Islam is always at war with the infidel until the Jews are exterminated, Christians enslaved, and all others converted or killed.

Taqiyya is a very effective weapon for spreading Islam because all other religions have a high regard for telling the truth, and believe lying is a sin. Consequently, gullible infidels expect Muslim religious leaders to have the same respect for truth. So when Mullahs and Imams tell them that Islam is the Religion of Peace, they are predisposed to believe it.

How taqiyya can backfire on Islam
Although taqiyya is a very effective weapon for Islam, it is also a double-edged sword. Taqiyya is only effective as long as the infidels are unaware of it. Once the infidels suspect they are being systematically lied to, taqiyya works powerfully against Islam.

People hate to be duped
Once infidels have understood taqiyya, the Islamic propagandists have effectively put themselves in the position of the boy who cried wolf, and nobody will believe them even if they say that two and two makes four, without adding it up for themselves.

Win the propaganda war - spread the word about taqiyya!
Consequently, we must use taqiyya against Islam by making everyone aware of it. If there's one fact that infidels need to know, it's that Muslims tell lies to advance Islam.

This is fundamental, and all else follows from it, because infidels will then question everything that they have been brainwashed into believing about Islam and everything their children are being taught in dhimmi schools, and will seek out independent sources on the web. They will also regard every statement from Muslims about Islam with the same cynicism they view politicians' promises, especially if they know the basic tactics of taqiyya in advance, so they can slot every lie into the well-recognised categories listed here.