Excuse me, I don't want to get too involved in this argument. But you do say you don't blame, then you say how can you not blame ... Emotions are heightened right now. I understand your feeling of protectiveness towards the children and your sense of adult responsibility. We do not know the full story and we were not there. Believe me, how I wish this horror had not happened today.
I believe unless any of us have had a gun to our heads, we have no idea how we would react. Most of us would instinctually do whatever the gunman dictated. It's nice to think we would do differently, but I bet the majority of us would FLEE as fast as our feet could take us if told to leave.