The concept of Jihad is very much different to today's suicide bombings. Jihad also differs from the holy war in the Crusade period, which developed from the doctrine of self-purification through bloodsheds.

Jihad always relies on the power of da'wah (missionary endeavour) and the absence of vengeance feeling. In Jihad, you should not assume yourself to be a killer, nor should you sacrifice the enemy because it is God's will. In the concept of Jihad, war is always regarded as something bad ('syarr), an inevitable evil ('syarrun dlarûrî), and we have to avoid it ('kurhun). War is only permitted to liberate Muslims from tyranny or to defend them from attacks. That is the concept of Jihad.

My critique is that the bombers' concept of Jihad has neglected Quranic pre-requirements about the detailed preparation of war.