Evil isn't hiding under your beds or in your closets, it's not lurking around the corner or down some dark alley.  It's not in the blade or the handle of a knife, it's not in the bullet or the gun or the bomb or the boom.  Evil only lives and breeds in the heart of  men and it is kept alive and well generation after generation, handed down to our sons and daughters as they are taught greed and fear and lust and hate.
So next time bullets go flying across the school yard or bombs fall from the sky and find hospitals instead of their "targets" or a child is beaten or murdered or ***** by its father or preacher or mother or sister or teacher or brother or friend... and you wonder what kind of monster, what evil would allow?
Look in the mirror, stare into the darkness in the pupils of your reflection and listen to the soundless echo of the blackness you find there.  Do not blink, do not turn away, let your eyes and mind adjust to the horror staring back at you... The evil infesting and rotting away at and in your own heart.  It's been living and thriving in the silent bubble you've built around your days and nights.  All the years you quitely ignored your hearts cries for help as evil made itself at home.
Every time evil made the front page news, instead of fighting back, you decided to just turn the volume down.  Knowing it was there and knowing it was wrong...  Were you hoping it would go away while feeding it your doubts and fears and hate?  Did you think that you could make it fat and satisfied and it would then find somewhere new to roam?
Don't look for the devil to blame or the absence of prayer in the classroom or the sky you claim to be empty of god... Stop petitioning deities to save you from the evils of the world when those evils are your own monsters walking and dancing and playing in the blood of your own heart.