As a child of about 9 or 10 years, I and one of my brothers went riding our bicycles and found ourselves with some other kids on an empty lot at the back of a veterinarian's clinic. The vet was doing autopsies on some sheep, and we stood there watching, mesmerized by the horrific gory sight. I don't know why we were not shoo-ed away. I had nightmares every night for some time after that, seeing those images all over again.
In my professional work (CNS, community mental health) I certainly got to see a lot of the seamy side of life, and coped with it just fine, just having to do so. It was just what we did. I've been away from it for a few years and don't think I could go back to it very easily now. Since leaving, I returned to the Christian faith and it probably does have much to do with the work of the Spirit... being more deeply touched by tragedies affecting others. I've been through some since with my own immediate and extended family, and I can't switch off from it the same as I used to... used to
have to as the CNS of a large team in a low decile urban area.
As you have mentioned, 3GR, I have also found Paul's advice to the church at Philippi (
Philippians 4:8) is a good antidote, together with prayer.