Arendt’s subtitle famously introduced the phrase “the banality of evil”. In part the phrase refers to Eichmann’s deportment at the trial as the man displayed neither guilt for his actions nor hatred for those trying him, claiming he bore no responsibility because he was simply “doing his job” (“He did his ‘duty’…; he not only obeyed ‘orders’, he also obeyed the ‘law’.”p. 135).
Arendt, H. (1964). Eichmann in Jerusalem. A Report on the Banality of Evil. Revue Francaise De Sociologie, 6, 100.