[rad88]

Blowing up buildings, murdering jews, plotting assassinations etc. is substantially damaging. It is "extremist".

[all2]

I'm unfamiliar with these. Sources?

[mrguyorama]

Bombing abortion clinics used to be a fun pastime. Go read a newspaper from the 70s or 80s.

The FBI has considered right wing extremism a serious threat to the US since before Ruby Ridge and Waco. The turner diaries was written before either.

And the KKK was exactly a militant right wing political group, with members being politicians, sometimes openly.