Modus operandi is used to describe the methods employed by individuals during the execution of a crime. It opens a whole new range of options to the terrorists that were previously considered unthinkable and probably the most troubling of these options is the use of chemical, biological, or nuclear weapons. Compared to a classical car bomb or suicide attack, the new modus operandi or tactic to attack soft targets, including major landmarks and also kill foreign nationals has the advantage for the terrorists of remaining in the news for a much longer time. It has also a much higher psychological value on the population. The work examine the constellations of group variables such as group psychologies, group behaviours and structures, ideology, available weaponry and material toward extrapolating how they directly influence group strategic targeting approaches, targeting preferences and attack modus operandi particular to individual groups.