little Eichmann

noun1

1. •
   (slang, offensive) Someone who is like the Nazi leader Adolf Eichmann; someone who seems ordinary but does evil as a member of an immoral or evil entity or system.

   • Russian journalist Andrei Zhukov's work in Soviet archives produced a list of over 40,000 little Eichmanns who acted as willing, if not enthusiastic, executioners. — 2018