This seems like a decent first survey of a couple of axes of violent dissent (far right political and religious), but possibly misses a trick by not examining t

This seems like a decent first survey of a couple of axes of violent dissent (far right political and religious), but possibly misses a trick by not examining the radical left that caused so much mayhem over the past year. It would be particularly interesting to know if those extremists on the left share common causal or behavioural factors with their political opposites (while in some qualitative way maintaining differences with the religious extremists).