Whose mania?
BBC, always good parody material, interviewed some Expert On Terrorism who emitted a bunch of vaguely valid but trivial pop psych junk, along with some absolute lies.
The Expert characterized Breivik and Kaczynski as 'white supremacists'. Precisely wrong. Bizarrely wrong.
Those two are unique among recent serious radicals, in that B & K are NOT rebels. Their belief systems are identical to the belief system of BBC, EU, US, Cameron, Clegg, Miliband, Obama, Bushes, Clintons, ABC, NBC, CBS, CNN, MSNBC, Fox, and every newspaper in the Western world.
B & K were not opposed to the Establishment at all. They merely felt that the Establishment wasn't acting quickly and harshly enough to enforce its beliefs. They tried to help. But their 'help' was vastly less efficient than the Establishment's existing work. B & K killed dozens while the Establishment was (and still is) killing millions.
I suppose they did help the Establishment in a backhanded and frustrating way. After an amateur tries to compete with the system at a retail level, the system always inverts the message of the amateur and uses it as 'justification' to redouble its existing wholesale genocide.