Will the Norway Massacre Deflate Europe's Right Wing? The killings could weaken nationalist fervor in Europe, as the Oklahoma City bombing cooled off militias in the U.S. in the late 1990s.

http://www.nytimes.com/roomfordebate/2011/07/27/will-the-norway-massacre-deflate-europes-right-wing/behind-the-us-vs-them-mentality-over-islam