I did a Google search for the first sentence and found this Facebook page.
The passage you cite is lifted directly from Americans for Impeachment of Marxists.
http://www.facebook.com/group.php?gid=242193496056
This is evidence that the whole manifesto is a fraud.
If he did the attack to “market” his manifesto, wouldn’t you expect that the manifesto would be his own creation and not a cut and paste effort?
Sounds to me like a crafty bit of propaganda by Islamists.
He’s apparently copied whole sections of the Unabomber manifesto, and cites (with proper credit, at least), many segments from postings written by the blogger ‘fjordman’.
In regard to AIM, on pages 1265-1266 of the Manifesto, he cites AIM (and uses the quote) as an “innocent looking” Facebook template that can be used in order to create a pan-European terrorist network.
I don’t however, suspect Islamists were behind this. That’s like seeing Reds under every bed. You know, the right is just as capable of terrorism as anyone else. Evil doesn’t recognize, nor is it limited to, any particular ideology.