Norway's prime minister [Stoltenberg] struck a defiant tone Wednesday, saying the response to twin attacks that have rocked his country will be "more democracy."...Or, to quote the Sage of Baltimore (H.L. Mencken): "The cure for the evils of democracy is more democracy."
Stoltenberg said that extremist views are legitimate in a democracy but implementing them violently is not.
HT Brother Dave
By the way, it's terrorism regardless of who commits the act. Timothy McVeigh was a terrorist, as was the white nutjob who flew a plane into a Federal Center in Texas sometime last year.