These authors appear to be FBI operatives.
https://foreignpolicy.com/2022/02/09/far-right-terrorism-extremism-target-selection-jihad-enemy/
How Far-Right Terrorists Choose Their Enemies
Debates over which targets to prioritize aren’t exclusive to jihadi groups.
By Jacob Ware, a research fellow at the Council of Foreign Relations and an adjunct professor at Georgetown University and DeSales University, and Colin P. Clarke, the director of research at The Soufan Group and a senior research fellow at The Soufan Center.