I realize it's insensitive to comment on the politics of it so early, but when the bombing first happened, all conservative western media immediately blamed Muslims. Then, when it was found to be done by a white Christian Norwegian, the news turned to "perplexing." The guy is a right-wing fundamentalist Christian racist extremist. I was lucky enough to see the video he posted on YouTube (don't know if it's still there). He's convinced that Muslims are taking over Europe and that liberal Europeans (Norway's Labor Party, which he attacked, are slightly to the left) are allowing it.
His "manifesto" said liberalism and multiculturalism are destroying European Christian civilization and calls for a Christian war against the threat of Muslim domination.
Religious extremists of all kinds are evil and dangerous. When was the last time an act of terror was carried out by a moderate atheist?