2017 - DVEs caused 8 deaths
2018 - DVEs caused 17 deaths
2019 - DVEs caused 32 deaths [the most lethal year since 1995]
We are talking about murderers here, primarily lone offenders. This isn't a malicious tactic for going after political opponents or free speech.
"The FBI and DHS define a Domestic Violent Extremist (DVE) as an individual based and operating primarily within the United States or its territories without direction or inspiration from a foreign terrorist group or other foreign power who seeks to further political or social goals wholly or in part through unlawful acts of force or violence. The mere advocacy of political or social positions, political activism, use of strong rhetoric, or generalized philosophic embrace of violent tactics may not constitute extremism, and may be constitutionally protected." - https://www.fbi.gov/file-repository/fbi-dhs-domestic-terrori...
Are there more serious issues in America? Yes. Does that mean we should ignore this growing threat? No.