NY Times, June 2015 - Despite public anxiety about extremists inspired by Al Qaeda and the Islamic State, the number of violent plots by such individuals has remained very low. Since 9/11, an average of nine American Muslims per year have been involved in an average of six terrorism-related plots against targets in the United States. Most were disrupted, but the 20 plots that were carried out accounted for 50 fatalities over the past 13 and a half years.
In contrast, right-wing extremists averaged 337 attacks per year in the decade after 9/11, causing a total of 254 fatalities, according to a study by Arie Perliger, a professor at the United States Military Academy’s Combating Terrorism Center. The toll has increased since the study was released in 2012.
Last year, for example, a man who identified with the sovereign citizen movement — which claims not to recognize the authority of federal or local government — attacked a courthouse in Forsyth County, Ga., firing an assault rifle at police officers and trying to cover his approach with tear gas and smoke grenades. The suspect was killed by the police, who returned fire. In Nevada, anti-government militants reportedly walked up to and shot two police officers at a restaurant, then placed a “Don’t tread on me” flag on their bodies. An anti-government extremist in Pennsylvania was arrested on suspicion of shooting two state troopers, killing one of them, before leading authorities on a 48-day manhunt. A right-wing militant in Texas declared a “revolution” and was arrested on suspicion of attempting to rob an armored car in order to buy weapons and explosives and attack law enforcement. These individuals on the fringes of right-wing politics increasingly worry law enforcement officials.
In a survey we conducted with the Police Executive Research Forum last year of 382 law enforcement agencies, 74 percent reported anti-government extremism as one of the top three terrorist threats in their jurisdiction; 39 percent listed extremism connected with Al Qaeda or like-minded terrorist organizations. And only 3 percent identified the threat from Muslim extremists as severe, compared with 7 percent for anti-government and other forms of extremism.