> Your understanding seems to be based completely off the agitprop the media passes off as "news" and the politicians push for donations.

The FBI is neither of those institutions.

https://www.fbi.gov/news/testimony/threats-to-the-homeland-e...

https://www.fbi.gov/file-repository/fbi-dhs-domestic-terrori...

https://www.justice.gov/jmd/page/file/1398831/download

https://homeland.house.gov/news/in-the-news/domestic-terrori...