One who escaped the onslaught said the murderers "looked like ordinary people."
She went on to describe them as wearing baseball caps and sweat shirts. In other words, they fit in.
What can we learn from this? Evil exploding from ordinary looking people? It's incomprehensible that humans can turn on their fellows like rabid dogs. And based on a twisted medieval ideology that says if you're not one of us you should die.
What comes from this for me is the same thing that I realized after the attack on 9/11.
And that's that we live in a world that is unpredictable and sometimes evil. But we can't allow this to make us cynical, hateful, or fearful. We mustn't let these atrocities consume us. That'll mean the terrorists achieved their purpose.
For me the message is to live life as if it matters. Be kind to ourselves - and be especially kind to others. Don't waste precious moments on this planet bickering over things that don't matter. Or even things that seem to matter.
Spend our moments in a positive way.