No he killed the wrong people.
I don't condone anything Breivik did, but from the beginning it reminded me of Andrew Vachss's novella A Bomb Made in Hell - where the children of the mob are exterminated by Vachss's emotionally dead super-assassin character Wesley (also a staple in the long-running Burke series of novels). Might as well have been a blue print for Breivik.
Again, I am NOT an apologist of Breivik's. Just a former reader of the Vachss novels - the early ones were excellent for the genre.