Steve 2 - Yet, in terms of actual behaviour, JWs do not advocate or carry out any part of this 'destruction'. Is that an extremist belief though? Yes. Does it lead to extremist behaviour? No.
Simon - A christian practicing their beliefs is usually a normal, functioning member of society. A muslim actually practicing their religions beliefs is a psychotic killer.
When one considers that, in obedience to the Watchtwer's teachings, most Jehovah's Witnesses treat ex-members as though they are dead men walking, waiting to be destroyed in the Armageddon, I would argue that such BEHAVIOR is worthy of being classified as "extremist". They "kill" family members and friends by cutting them from their lives and treating them as if they were dead. That behavior is psychological violence.