Anders B. Breivik does sound (and look) like a potential terrorist from his Twitter profile, with its single tweet (and mildly crazy-eyed portrait):
One person with a belief is equal to the force of 100 000 who have only interests.
His (translated) blog posts, on the other hand, sound like the work of a run-of-the-mill European cultural conservative, not someone who believes in leading a violent revolution.