radicalize
US /ˈræd.ɪ.kəl.aɪz/
UK /ˈræd.ɪ.kəl.aɪz/

1.
cause (someone) to adopt radical positions on political or social issues
:
•
The group's propaganda aimed to radicalize young people.
•
Exposure to extremist views can quickly radicalize individuals.