This was not an attack by a mentally deranged, lone-wolf gunman. This was not an 'un-Islamic' attack by a bunch of thugs - the perpetrators could be heard shouting that they were avenging the Prophet Muhammad. Nor was it spontaneous. It was planned to inflict maximum damage, during a staff meeting, with automatic weapons and a getaway plan. It was designed to sow terror, and in that it has worked.