extremist
US /ɪkˈstriː.mɪst/
UK /ɪkˈstriː.mɪst/

1.
estremista, radicale
a person who holds extreme political or religious views, especially one who resorts to or advocates extreme action
:
•
The government is trying to combat extremist groups.
Il governo sta cercando di combattere i gruppi estremisti.
•
His views are considered too extremist for mainstream politics.
Le sue opinioni sono considerate troppo estremiste per la politica tradizionale.
1.
estremista, radicale
holding or advocating extreme views or measures
:
•
The group's extremist ideology led to violence.
L'ideologia estremista del gruppo ha portato alla violenza.
•
He was known for his extremist political views.
Era noto per le sue opinioni politiche estremiste.