Columbia subject headings:
Extremists--Psychology.
Fanaticism--Psychological aspects.
Radicalism--Psychological aspects.
Harvard subject headings:
Extremists--Psychology.
Fanaticism--Psychological aspects.
Radicalism--Psychological aspects.
Princeton subject headings:
Extremists--Psychology.
Hate groups--Korea (South).
Korea (South)--Social conditions--Psychological aspects.
Radicalism.
Social problems--Psychological aspects.
Social psychology.