Could someone who deliberately chose to murder 77, mostly young, people for an ideological cause, be classified as not mentally ill?
Surely the act of believing such a thing was a 'necessity' indicates he has mental health problems i.e. that something other people have that stops them killing people wasn't there?
But could the level of planning to do such a thing only possible if a person had a level of 'sound mind'?
Just to pre-empt some points that might come up-
-I don't think mentally ill people are 'nutters' or 'mentalists', and know people with mental health problems are more likely to have violence meted out on them than be the perpetrators of violence
-I don't mean any disrespect to the victims or families of the victims asking the question, I was thinking about the 'grey' areas of mental illness where someone's diagnosis might not fit neatly into a category from the DSM
-I haven't spoken to Breivik or know anything about his mental health, so am not passing comment on whether he is mentally ill or not, but am thinking about a wider definitions of people who try to rationalise killing lots of people.