"The Stranger's" strange ending

Did we lose Mersault before the last page of the novel? When he snapped at the Chaplin, he says on those two pages, "He wasn't even sure he was alive because he was living like a dead man... Yes, that was all I had. But at least I had as much of a hold on it as it had on me.  I had been right, I was still right, I was always right" (120-121).  During this monologue of Mersault, he is sure of himself for the first time in the novel, he is able to make a decision on something, he was now able to see, even as a condemned man that life ended the same for everyone, in death.  So why should everyone blame him or find him guilty for his wrongs in life? For not crying at his mother's funeral, for killing a man?  He lived his life the way he saw fit for himself, despite his fate.  He is not the same Mersault from the first page of the novel, confused of life and what is taking place in front of him.  That stranger that took over him is gone.  Now, knowing his fate he is able to see more clearly, of this life he has lived and accepting the consequences of his past decisions.