I don't understand

How people can so easily abuse the innocent. I have an extremely hard time listening to stories about children who have been abused in every way possible.
I was at my mother in laws yesterday and a story came on the news about a child that was abducted and found alive two hours later with horrible things that had been done to here. I can't handle hearing these things and will often run from the room while covering my ears and making loud noises so I can't hear it. Or turn it off if I can find the remote fast enough.
These stories will literally haunt me for years. My body starts to feel weak, my stomach goes cold, I start to sweat, and sometimes dry heave. It hurts to much. I can't handle it.
Well I ran out the door at my mother in laws house covering my ears. She has never seen me do this and thought I was nuts and told me this is the real world. You can't run away from it. I was in to much pain to even answer.
These incidents take me to a dark place that I don't want to be in. I understand these things happen and maybe I should talk to my therapist on a better way to deal with it.
But it feels like I'am falling into hell and if I think or talk about it I will never get out.
There are four things I can't handle: abuse of children, animals, the handi-capped, and the elderly. But children bother me the most.