Americans Killed Annually by Terrorists February 07, 2017 How many fatal terror attacks have refugees carried out in the US? None You’re More Likely to Die Choking Than Be Killed by Foreign Terrorists, Data Shows Odds of fatal terror attack in U.S. by a refugee? 1 in 3.6 billion Facts still matter on US terror threat Americans are almost seven times as likely to be killed by a white extremist than by an Islamic one, according to one study. Citing a 2013 study, the New York Times notes: "Right-wing extremists averaged 337 attacks per year in the decade after 9/11, causing a total of 254 fatalities." According to the Southern Poverty Law Center, there were 42 militia groups in 2008; today, there are 276. Meanwhile, anti-government groups grew to 998 in 2015, while the number of right-wing hate groups grew from 784 in 2014 to 892 in 2015. According to the Anti-Defamation League, "domestic extremist killers" killed more people in 2015 than any other year since Oklahoma City in 1995 (In fact, here is a list of radical right wing terrorist plots, conspiracies and attacks since 1995).