After Rin's death, Obito's determination and idealism were shattered. He became more calm and focused, no longer caring about his village, his friends, or even his name, all of them being worthless parts of a miserable world that had forced Rin to die at the hands of a person she loved. His sole commitment was to Madara's Eye of the Moon Plan and the new peaceful world it would create; every crime was a necessary evil, every murder was a sacrifice for the greater good life.