All people deserve to be loved and treated with compassion, and we all have our own gifts that can help certain others along the way. But no one person has the mental or emotional capacity to give to just anyone.
For example, I would never intentionally befriend the person who wrote the quote below, or have any desire to work with them. I have no problems with saying that they would be at the bottom of my personal ladder:
Ever since I was little I've had what I guess you could call 'fantasies' about hurting people. When I was 13 I had urges to strangle my stepsister to death. One morning before school I attempted it and I enjoyed doing it. She was trying to scream but couldn't and just before she went unconscious, I stopped, as I knew I had no plan of what to do after the death...When I was 15 I chased my neighbours friend down the road with a large knife, hoping to stab him and watch him bleed to death. He was a fast runner so he got away.