And I suspect there always will be some overlap. The methods appear to be the same as gang/mafia style attacks or some type of disturbed psych killer. Somebody or some group that is trying to make a point.
IMO:
The OK beheading was done by a very disturbed man who just happen to have converted to Islam. The Ft. Hood shooting not so sure, even though I orgianlly thought it was workplace violence, but not so sure anymore.
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