This is the unbelieveable part. One would think that next to saving as many hostages as possible, this would be the top priority.
I would have had a triple ring around that school and evacuated every building for a kilometer around and positively identified every person coming out. Once the perps were identified, take them out to the forest, kill them and leave their corpses to rot.
I find it unbelievable also.
The explanation I saw was that as the children ran, the terrorists were shooting them in the back, and the commandos were stopping to grab the children.
Not until you torture them with hot needles on their genitals until they beg for death and rat out their entire leadership. Sorry, but we have got to start acting this way.