>Curiosity, the desire to obtain knowledge, is one of the defining traits of human beings. Yet there are situations when people willingly choose not to know. This phenomenon — deliberate ignorance — has been attracting a growing interest from researchers in various scientific disciplines.

This is not about how to solve a puzzle, or why bumblebees can fly, or how the Moon was formed....!!

This is like finding out that your best neighbor is Jewish and for some stated absurd and obscure reason you have to deal with it.

I can imagine that some folks were forced/suckered into the Stasi-situation and are deeply sorry. That doesn't make it an excuse yet finding out about them forces an opinion, and an emotion, a separation, and all that stuff we actually don't like about that world war - what we don't like about any war.