By killing to most kind and generous and caring outsiders, the enemy more effectively demonstrates their cold-blooded lethality and grim determination to rule the country.
Remember that two Afghanis were part of--- and died with --- this medical mission group. And there are many in Afghanistan who were and are friends and cooperators with the medical mission people, who helped them and were helped by them for 30 years or more.
So there are 2 sides. More than 2 sides. As always, we try to distinguish between the executioners and the victims.