The investigator who caught Eichmann independently echoed the banality thesis.

Evidence

The impressions of Simon Wiesenthal (1989, p. 66), whose investigative work led to Eichmann’s capture by the Israelis, are very similar. He describes Eichmann as “an utterly bourgeois, an utterly normal, almost in fact a socially adjusted, person… . He was not driven by blood lust.” — Leonard S. Newman and Ralph Erber (eds.), Understanding Genocide, 610