Nasheeds

From Wikipedia:

A Nasheed is an Islamic-oriented song. Traditionally, it is sung a cappella, accompanied only by a daff. This musical style is used because many Muslim scholars interpret Islam as prohibiting the use of musical instruments except for some basic percussion. Many people admire the purity and simplicity of the music.

As-Sahab, the media wing of Al Qaeda, frequently puts out videos accompanied by nasheeds. Like this one, for instance.



SITE described such videos this way:

Some segments bear the logo of as-Sahab, an al-Qaeda multimedia producer, and others feature clips from attacks executed by the Islamic Army in Iraq and Mujahideen Army, depicting commonness amongst the mujahideen groups’ operations. Islamic nasheeds play over opening scenes of mujahideen carrying weapons and backpacks through a mountainous region, then distributing armaments amongst members and performing training exercises involving the hurling of grenades and firing guns and mortars.

Here is a nasheed called Ghuraba (Strangers). I believe it was written by Sa'ad Al-Ghamidi. Note the lyrics. It's easy to see how such enchanting music can be used to enflame the passions of the jihadis.



From here:

“Islam started as something strange and will return as something strange (as it began), so Toobaa (a tree in Paradise) is for Strangers.” [Related by Imaam Muslim in his Saheeh (2/175-176) and Ibn Majah (2/320) from Abu Hurairah]