It is hard to wrap your head around murder at all, but when it involves so many precious, innocent children, the reality is almost unfathomable. But as hard as it is to understand, we need to all remember that the world is full of balance. While there is evil and insanity that walks this Earth, there is also good.
Peace on Earth may never happen. At least not in our lifetime, if ever. But we can make a difference, by remembering to pray for those lost souls that wander the Earth in search of a way to fulfill their evil deeds. Be kind to one another, this is the first step in bringing peace about. A lot of people never experience kindness from others, and this can, of course turn people bitter and even eventually fill them with hate.
Love your neighbors, but be aware. Do not fall in to the trap of thinking that all the world is evil. There are good people walking among us, including yourself.
Remember, peace on Earth, goodwill towards every man, woman and child.