In coming to terms with our own sin, we must come to terms with the sins of others and with the sinfulness of the human race. This is fundamental. There is no other context for the human story. We have sinned. We have been surrounded by sinners. We have been brought up, raised and taught by sinners. Those who love us most are also sinners, and some of them have done terrible things that have affected us.
Read the whole thing. Personally, I thought it was excellent.