Kehoe of the 1927 Bath School Disaster (with a stictly personal grudge) proves how calculating (and seemingly "professional") a "lone wolf" can be.

So, when someone says an IED has all the markings of an AQ or Aryan Nation operation, my BS meter tends to respond negatively until some real linking evidence appears.

To the extent that right and left have any real materiality, I'd class the "Islamist fringe" as extreme right - even reactionary.

Regards

Mike