It is not Utopia. Some people come online expecting a futuristic perfection where people all act with a higher purpose. It's interesting, this expectation that human nature will change simply because communications technology takes a giant leap forward. Perhaps it will over the long haul, but online hasn't yet had a long haul. People can usually be expected to act online much as they do offline.
People can be incredibly kind and giving.
I've seen people go out of their way to console others who are terminally ill. People have raised money for others who lose their income due to illness. They've supported each other through diseases, new parenthood, loss of jobs, divorces, and natural disaster. I've even seen an online community rally around a lawyer who lost everything in a moving van fire. If an outpouring of kindness towards a lawyer isn't the best of humanity, I don't know what is.