The text suggests that if someone has done us harm we should go talk to them. Of course, we need to be intentional about the spirit in which we do it. Another caution is that this kind of process be carried out with the utmost humility and self-searching, that we be careful before we decide that someone else needs to hear from us about what they have done. It is a fact that we all are imperfect and often have no justification for finding someone else at fault. This kind of Truth-telling, going to the person and telling him or her of our pain and our perception of their part in it, has as its underlying agenda a yearning for reconciliation.
Reconciliation is the focus.
The responsibility for initiating the process of reconciliation falls in the lap of the offended rather than the one doing the offending. And to take it to the whole community, in public, seems a bit much of an invasion of privacy, in addition to further hurting the chances for success of the process. The other clarification is that we need to put the harshness of this teaching in perspective. The final word here may be never lose hope for reconciliation, and never be surprised who may respond. So we see that God is not, under any circumstances, going to ever give up on us.