LOL . . . we all remember when Barack Obama refused to allow any domestic Islamic act of terrorism to be labeled a domestic act of Islamic Terrorism. Ever hear of the conservative hating Poverty Law Center who told the FBI who was or was not committing political violence for decades? Their politically skewed propaganda was accepted as irrefutable fact by the FBI for far too long. So those statistics are contaminated garbage statistics.
When leftists control who is or is not considered to have committed political violence, they tend to discount things like the violent BLM leftist-sanctioned rioting, looting, and arson that happened for more than six months.