Only God can forgive Benedict and Aitcheson.  We might question their ability to lead as Aitcheson is doing so himself.  Benedict did resign probably because the international community had threatened to bring to light his own problems of not protecting children from sexual predators and there was the Vatican Bank and its connection with the mafia and probably Opus Dei.  So yes we as humans can forgive both but we can not forget. Aitcheson seems to recognize this, but I do not believe Benedict does.  Certainly Saint JPII did not recognize the tremendous destruction he was responsible for in the lives of people who suffered clerical rape and did not recognize the tremendous destruction he did in allowing Oliver North to launder CIA money through the Vatican bank to be used by death squads in Nicaragua.  So, yes, we humans can forgive but never forget and yes only the forgiveness of God is important.  Perhaps God did forgive JPII but Francis was naive in making him a Saint of The RCC.