[IvarTJ]

Your thoughts match up with Anders Breivik living in a part of Oslo, a city with a large portion of early-generation immigrants from non-western areas, which was predominantly white.

http://en.wikipedia.org/wiki/East_End_and_West_End_of_Oslo

[gwern]

Correct me if I'm wrong, but didn't his manifesto discuss how he was radicalized in part by the minorities in Oslo when he was living there?