Benoit had a son with physical and possibly mental defects.
Fathers have aspirations and expectations for their sons, whom they view as the physical embodiement of their own hopes and dreams.
Benoit may have had dreams of his son as going into the family business someday. All that was crushed when the son was born a less than perfect physical specimen.
Benoit may have been angry at his wife for not having the athletic son he had wanted.
While I was in Bethany Beach, Delaware last month with my club, I saw a father in a toy store, showing his Down's Syndrome son some wind up toys. He wound up a barking toy dog. The son watched it and laughed. The father wound up other toys, which walked around and made various animal sounds. The son laughed at those, too. I could tell that the father truly loved his son and accepted him as he was.
Perhaps Benoit could not love his own "defective" son at all, and 7 years of disapointment had made him angry at his wife and son.
This long term unhappieness was finally expressed in an explosion of rage last weekend.
I don't pretend to know exactly why Benoit had murdered his family, I merely offer a possible explanation.
