I agree about the satanic.
However, those boys had some level of ATTACHMENT DISORDER.
NO DOUBT.
And whatever the parents did right, that they did very wrong.
I am very familar with Reactive Attachment Disorder and the Columbine crime, there was no indication that Klebold had RAD. Eric Harris maybe, but only from the standpoint that he was a psychopath which tends to have a RAD background, but the history was not all that clear for RAD either.