I remember in her Oprah essay she blithely excused herself and claimed she had no idea he was troubled. Then as the essay goes in she mentions his crime and problems at school and STILL tries to excuse herself for not taking any action at all.
She’s a loser and she raised one.
I, too, read the Oprah essay, but came away with a gentler view of the mother than you did. I believe that she was a devoted mother to her son, but that her son gave into evil. Perhaps if they had raised their children with some religion — beyond a few visits over a couple of years to a Lutheran church — her son would have resisted evil, but who knows? The book Columbine by Dave Cullen was superb. I recommend it. It puts the blame where it belongs: on the shoulders of the shooters themselves.