legally speaking however, madman and terrorist are pretty differently treated. i agree CBW that he is acting as a terrorist for nationalism, however it remains to be seen whether his terrorism is more than conceptually connected to nationalist movements. as far as i can see the people who may champion similar anti marxist and anti immigration views are not armed and prepared to take action outside of the country's laws - only intimidation and incendiary diatribe. http://en.wikipedia.org/wiki/Lone_wolf_(terrorism
Traditional organizations leave behind much evidence of their activities, such as money trails, and training and recruitment material. Leaderless resistances, as they are as much ideologies as organizations, generally lack such traces. The effects of their operations, globally reported by the mass media, act as a sort of messaging and recruitment advertising.
The internet provides investigators with further challenges. The individual cells (and even a single person can be a cell) can communicate over the internet, anonymously or semi-anonymously publishing and sharing information online, to be found by others through well-known websites. Even where legally and technically possible to ascertain who accessed what, it is often practically impossible to discern in reasonable timeframe who is a real threat and who is just curious, a journalist, or a web crawler.
Despite these advantages, leaderless resistance is often unstable. If the actions are not frequent enough or not successful, the stream of public messages, serving as the recruiting, motivation and coordination drives for other cells, diminishes. If the actions are too successful, the result will be formation of support groups and other social structures—structures vulnerable to network analysis.