Most ironically and according to the Department of Homeland Security on the recent Threat Assessment https://www.dhs.gov/sites/default/files/publications/2020_10_06_homeland-threat-assessment.pdf white supremacists are the most persistent and lethal terrorist threat to America
PS - Also ironically a group of Republicans (the Lincoln project) recently decided to ridicule Trump in order to help Biden get elected https://lincolnproject.us/video/mourning-in-america/