Just two days ago, in an editorial called "The Other Terror Threat", the NY Times warned us:

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.

Other data sets, using different definitions of political violence, tell comparable stories. The Global Terrorism Database maintained by the Start Center at the University of Maryland includes 65 attacks in the United States associated with right-wing ideologies and 24 by Muslim extremists since 9/11. The International Security Program at the New America Foundation identifies 39 fatalities from “non-jihadist” homegrown extremists and 26 fatalities from “jihadist” extremists.

Meanwhile, terrorism of all forms has accounted for a tiny proportion of violence in America. There have been more than 215,000 murders in the United States since 9/11. For every person killed by Muslim extremists, there have been 4,300 homicides from other threats.

Public debates on terrorism focus intensely on Muslims. But this focus does not square with the low number of plots in the United States by Muslims, and it does a disservice to a minority group that suffers from increasingly hostile public opinion. As state and local police agencies remind us, right-wing, anti-government extremism is the leading source of ideological violence in America.