I disagree with this. You don't need your parent's permission to forgive them their faults. Although it would be nice if they owned up to what you perceive as their failings, they don't have to to so for you to be able to move on. This is all about you and your perception of their parenting.
Not to minimize NLVD or how difficult things were for you, but you've got to remember all the positive things. Syracuse is one of the tougher state schools to get into. You must have persevered and done well despite your disability.