The rambling manifesto written by the Norwegian killer for anyone interested:
This guy is clearly completely insane. Apparently he appeared on Youtube in a wetsuit brandishing a Ruger Mini-14 and declaring 'a holy war under the banner of the Nordic cross' 6 hours before the attacks. And it's not as if he suddenly suffered a complete breakdown or anything as he's been working on his manifesto for years according to reports. I haven't read it yet but it's been reported that he 'admired President Putin' and that he had expressed many conservative sentiments, was pro-gay, was into weightlifting and first person shooter games.