He’s some sort of mental or emotional case, and could have been bribed or brainwashed.
I realize it’s early in the investigation, but I did read that they found “additional explosives on the island”. How would this guy have been able to do all he apparently did AND get more explosives onto the island. If the “farmer angle” is correct and that was how he could get the large amount of fertizer needed to make an Okla City type bomb - then we are talking about a physically large bomb in Oslo. It doesn’t seem logical that he could get another fertilizer type bomb out to the island without raising eyebrows. If the island explosives are something more compact - one would think there would be more to this than a disgruntled farmer. Hopefully the truth will come out.