Evil in this world

Once again I am baffled by the evil perpetrated by some people in this world.  It seems to be all around us and is prevalent in our country right now.  We look at the news from Afghanistan and Israel and think, "Those poor people, how do they live day to day with the evil in their countries, the bombs, etc." Then it happens in our country and what are we to think?  I am so low over this violence, I hate violence.  Yesterday, someone said to me what they thought what we should do to the bombers and it was more violence. Although I hate what the bombers have done, I don't see how meeting violence and evil with more of the same solves any of the problems.