I think the manifesto & the tapes & pictures SHOULD have been aired, just not at that particular time. It was like a one-two punch to the victims. After having suffered a devastating blow, they were subjected to yet another. What NBC should have done was announce that they had received materials from the killer, but that they would not be shown until a later date, out of respect for the victims - perhaps a week or two later, or even a month, thereby giving the victims and the nation time to heal. There should have been no RUSH to air them when they did.
(As you can tell, he isn’t quite out of my thoughts yet!) I’m not sure they’ll be able to glean anything useful from the rantings of this mad child, but my thoughts are with those that will have to go through all of his crap over and over and over again.