"That is not the same as seeking forgiveness for something not your fault. That is what I don't understand. "

You make assumptions not in evidence. pete is talking about people seeking forgiveness for things that ARE their fault, alcoholics, gamblers, violent abusers rapists, murderers and more. People who can't live with the things they have done. People who can't forgive themselves.

He mentioned Amazing Grace with is very apt.

It is written by a man grateful for the forgiveness of things he had done, including slave trading.

http://en.wikipedia.org/wiki/Amazing_Grace