Humans. Do. This. Repeat what they know. They hell they grow up in or experience, they usually will inflict on their children. No matter what he did, it's something good to be said that he tried so hard to not repeat the cycle. To have your sins be known fully, your ugliness to be seen fully, to commit your acts of insanity to hurt the person you love, and still be accepted and loves you? That, we humans rarely do.
Tenshi no Uta (NISHIDA Higashi)