The NSDAP was the dominant political party at the time, and after the war started, most eligible German and Austrian men were involved with the war effort in some capacity.
So I don't see why this would be shocking or what it has to do with Arnold.
Nobody is saying that Arnold is responsible for his father's crimes. They're saying that his father taught him nazi beliefs and principles, and now it's finally becoming obvious that he retained a lot more of those nazi principles than he's ever been willing to admit.
The NSDAP was the dominant political party at the time, and after the war started, most eligible German and Austrian men were involved with the war effort in some capacity.
So I don't see why this would be shocking or what it has to do with Arnold.
And under what sane legal system are the children responsible for the crimes of the parents?
Nobody is saying that Arnold is responsible for his father's crimes. They're saying that his father taught him nazi beliefs and principles, and now it's finally becoming obvious that he retained a lot more of those nazi principles than he's ever been willing to admit.