underscoring the last line of your post, Browning’s “Ordinary Men” is a must read on the topic as well.

In 1946, the body of a German woman, still warm, was removed from a gallows at the execution site near Bischofstein Hill, outside Danzig, Poland. Dressed in a brand-new skirt, she clung to a lingering devotion to beauty, yet her eyes were distorted and her life was gone. This woman was Elizabeth Becker, a female guard at the Nazi Stutthof concentration camp during World War II, convicted of numerous crimes against humanity and sentenced to execution by hanging.
Becker was born in 1923 in the town of Neuteich (now part of Poland), raised in a modest family. At the age of 13, she joined the German Girls' League, where she was indoctrinated with Nazi ideology and gradually drawn into the extremist system. From 1938 onward, she worked as a tram conductor, an office administrator, and an agricultural assistant, seamlessly transitioning into social roles under Nazi control. In 1944, she was conscripted by the SS, underwent training at Stutthof concentration camp, and became a female guard responsible for overseeing Polish female prisoners.
Stutthof was one of the earliest Nazi concentration camps established in occupied territories, housing approximately 110,000 people, over 60,000 of whom perished. During her four-month tenure from September 1944 to January 1945, before the camp's evacuation, Becker personally selected at least 30 Polish female prisoners for the gas chambers and participated in daily acts of cruelty, forcing prisoners to perform grueling labor such as digging and carrying heavy loads, intensifying the already dire conditions. In January 1945, she joined the camp's evacuation as part of a 'death march,' supervising the prisoners' forced march, resulting in multiple deaths along the way.
After the war, the Allied forces initiated the prosecution of Nazi war criminals. On April 25, 1946, the Stutthof trial opened in Danzig, presided over by a joint Soviet-Polish special criminal tribunal. Becker was tried alongside other camp staff, with prosecutors presenting survivor testimonies and camp records that confirmed her crimes. She admitted to selecting prisoners for the gas chambers but later recanted her confession; however, the court still found her guilty of crimes against humanity and sentenced her to death. Despite recommendations for clemency, the court upheld the original sentence. Becker had written a letter to the President of Poland pleading for mercy, citing her age and short service period, but her request was denied.
On July 4, 1946, the execution was carried out publicly, witnessed by thousands of local residents. The hanging was performed using a truck to pull the rope, and Becker remained suspended for several minutes before becoming motionless. After confirmation of death, her body, along with those of other criminals, was disposed of and buried in a mass grave near the execution site (some accounts suggest she was initially scheduled for medical dissection, but this was later changed to burial).
As one of approximately 3,500 female guards in Nazi concentration camps, Becker, executed at just 22 years old, became a representative example of young war criminals. Her transformation from an ordinary girl into a perpetrator reflects how Nazi propaganda could distort ordinary individuals. Today, the Stutthof concentration camp has been converted into a museum, and Becker's trial documents are preserved in archives, serving as a historical reminder of how 'ordinary people' can become entangled in extreme systems.