A new study on domestic terrorism, conducted by New America's David Sterman and Peter Bergen, found that right-wing terrorism in the United States has killed 48 people since September 2001. Those include attacks by white supremacists, neo-Nazis, and anti-government radicals.
By comparison, the study found that jihadist attacks killed 26 people in the same time period. That number only includes wholly domestic attacks, and does not include terrorism committed against Americans or American service members abroad. So these statistics alone should not be read as a holistic comparison of the threats posed by right-wing terrorism versus jihadist terrorism. But they are a reminder that the threat from right-wing terrorism, though we don't talk about it much, is real.