In the Epilogue of his The Way of Jihad Hassan al-Banna states:

This clamor is mounting from thousands of madrasas, schools, universities, and mosques; from the mouths of dozens of thousands of predicators and imams; from hundreds of fatwas; from innumerable books, pamphlets, articles, and audio- and videocassettes; and from television shows and small circles and cells. It is a deafening din that crowds out other voices in the Muslim world. Al-Banna's formulaic expression of a trope could have come from any of the radical-Islamic talking heads of the last half century, and many others who drone and psalmodize on the same theme.

The constant repetition of the same stock phrases that prescribe and exalt killing and the veneration of death means that Allah wants blood, needs blood, that blood pleases Allah, whether the blood is that of His martyrs or that of His enemies.