The full quotation from Breivik’s manifesto reads:
“Unfortunately, spectacular actions like these are the only way to be heard.”
Breivik’s action can be understood in a nutshell, as he himself quotes JFK: “Those who make peaceful revolution impossible will make violent revolution inevitable”, as shown in this video by David Wood:
Breivik’s manifesto, page 792:
An increasing number of Europeans are opening their eyes to the reality that the democratic struggle through dialogue has been lost.
It is counterproductive, even lethal to waste another five decades on meaningless dialogue while we are continuously losing our demographical advantage.
Still another quote:
Around year 2000 I realised that the democratic struggle against the Islamisation of Europe, European multiculturalism was lost. It had gone too far. It is simply not possible to compete democratically with regimes who import millions of voters.
I may not pull the trigger on unarmed teenagers to make a point, but these are not the words of a mentally unbalanced man.