Great post and great way to approach German history and the language imo. To me as a German I believe what happened around WW II should never have forgotten and serve as an important memorial on how fixating on differences divides people and never does any good. Most Germans learnt from the mistakes our ancestors made and by conserving the historical remains and using them as an omnipresent warning and reminder helps us keeping a quite humanitarian approach to the crisis we face in times of globalization.

Since I as a German myself can't answer OPs post in any meaningful way I still want to emphasize how important it is to understand what happened during that time and how careful we have to be to not repeat history. Understanding the language, being able to confront yourself with what's left of those gruesome times and dealing with the parallels you might find isn't only interesting, but essential.

Oh, and have to agree with the second mentioned point as well. The Wacken Open air festival is one of the most amazing places to be, if you enjoy metal!