. . . When tragedies like these occur, why do we respond with such shock and awe? Psychiatrist Keith Ablow said, “This kind of shock registers with people…because it seems like the unthinkable keeps moving into the sphere of our reality.” The “unthinkable” first surfaced in mankind thousands of years ago when Cain killed his brother Abel out of mere jealousy and rivalry. God had warned Cain, “Sin is crouching at your door,” but Cain ignored God’s word and committed murder. God punished Cain for taking innocent life but the violent shedding of blood has continued for centuries. Why? The...