We can't turn away after the initial shock wears down. If we do, we leave wide-open spaces in which perpetrators carry on. Perpetrators want us to turn our backs on them. Instead, we have to stare violence down, look it in the eyes, force ourselves to do the horrifically difficult work of understanding violent persons. Understanding them will lead to effective prevention programs.
Human beings are incredibly smart.
When we have the will and the means, we have accomplished great things. We've been to the moon. We've explored the depths of the ocean. We've conquered countless diseases. We do have the means.