Please directly provide the information from the FBI website that shows "74 percent of those killings were committed by right wing extremists. Only 2 percent of those deaths were at the hands of left wing extremists." The FBI itself has objected to these fabricated figures in press conferences. I will not disagree that right-wing domestic terrorism is a major issue that needs law enforcement attention at all levels -- but fabricating figures does not help legal efforts to eliminate the illegal activities of these groups.
With leftists, they talk of monetary damages (like animal rights groups), not human casualties. According to a major report published by the Government Accountability Office in April 2017, there were 62 fatal “far-right violent extremist-motivated attacks” leading to 106 deaths between 12 September 2001 and 31 December 2016. The most lethal of these, according to the report, was white supremacist Dylann Roof’s June 2015 shooting massacre at the American Emanuel AME Church in Charleston, South Carolina, which killed nine people. According to START (the University of Maryland’s National Consortium for the Study of Terrorism and Responses to Terrorism), there were 81 fatal far-right extremist attacks in the U.S. between 12 September 2001 and 31 December 2014, leading to 131 deaths. http://www.snopes.com/2017/06/07/threat-extremists-more/
So this merely demonstrates that the figures you provided are incorrect (as stated by the FBI), and the figures you provided directly above. I don't disagree that right-wing domestic extremists have caused more deaths in the U.S. than left-wing domestic extremists in the last decade or two. We need law enforcement to focus more on eliminating domestic terrorism.
They are not incorrect, different organizations are using their own methodologies to arrive at the figures https://www.revealnews.org/article/home-is-where-the-hate-is/
I will go with the official figures that federal law enforcement is providing rather than believe un-researched figures from third party organizations that have political agendas.