Question

why the father of Helmuth commited suicide?

Answer 1

because he was guilty and ashamed of being stroked by his wife

Answer 2

"Helmuth's father was a Nazi party member and a doctor who had done horrific experiments on the Jews in Nazi Germany.

He was responsible for a lot of misery.

One morning, Helmuth woke up to hear his parents say that they have to kill themselves or the Jews would do it.

The next day, after consuming some time with his son, Helmuth's father killed himself in his office.

His uniform was also destroyed in his house. Helmuth was deeply traumatized by the incident and refused to eat anything thinking the meal might be poisoned.