So instead of rushing to exclude people from society, society needs to provide people enough room to be themselves to keep from dangerous fiddling.
Further, forgiveness is a more critical tool to the forgiver than the forgiven. To forgive a grievance isn’t to forget it. It’s to put an end to the part of your resources devoted to punishing your opponent or thinking ill. That frees up those resources for more positive uses. The forgiven never needed to expend resources to earn your forgiveness and thus doesn’t have the same resource commitments - hence forgiveness offers less to the forgiven than the forgiver.