When Do We Talk About This?

Although in the 1990s the average number of attacks [by far-right groups and individuals] per year was 70.1, the average number of attacks per year in the first 11 years of the twenty-first century was 307.5, a rise of more than 400%.

  Combating Terrorism Center at West Point Military Academy Study 11/22: Understanding America’s Violent Far-Right

This may be explained, as the West Point study suggests:

Findings indicate that contentious and conservative political environments as well as the political empowerment are positively associated with the volume of violence; thus, it is not only feelings of deprivation that motivate those involved in far right violence, but also the sense of empowerment that emerges when the political system is perceived to be increasingly permissive to far right ideas.