OK Rupert, just an observation here so you can answer or not as you please. First of all I am what is considered an olde woman be 73 in Dec this year. I have spent these entire 72 plus years not knowing about the things you refer to in your post. I have heard the word hedonist and knew that it was someone who was self propelled to do wrong things, most likely with God in their hearts a missing quotient for them.
So, by my observation, I am wondering what age you might be, I am guessing in your 20's or your having been 20 not too long ago.
My thought connection is that a 20 ish person did the Ramsey crime, IF IF your thoughts are on the spot about the murderer. NOW then what 20 something year old person would have such a hatred about the Ramseys that they or he would kill a tiny child. Although in the Colorado sex offender list of 435 offenders that have committed more than one sexual offense. The crimes most often than not are against minor or small children. Many of these offenders are well over the age of 30, many look similar to David Westerfield, too plump, balding and drooly looking.
I can hear your rebut now, 'Oh, but, but other ages read such material and know of Nietzch'.
My rebut to your supposed rebut is that most 20 ish boys are more interested in sex period, and can also have major 'spats' and conflicts with their fathers, particularly when the father devorces their own mother, and takes on another one. Young men at that age when their hormones/testosterone are at a fever pitch would be the prime suspect in many matters of anger, and the results of that anger.
Just a random thought here, wonder what John Andrew received for Christmas from his father 'that' year, and when did he receive it and where was he when he received 'it'? Wonder IF IF he might have been in the Christmas video receiving 'it'. I have other wonderments that I will keep to myself.