I stumbled across this article the other day and found it to be extremely insightful.  It did cause me to pause and wonder why people are the way they are despite our best intentions.  It's about a man who did the right thing and who was promptly attacked for it by the person he was trying to help.  I strongly recommend that you read it as I believe you'll find it to be as disappointing and revealing as I did (although we expect the worst from people, so I'm not sure why I was surprised by any of it).