Wait, by joining in the army (whether or not he claims to have "fired a shot"), wasn't Ratzinger actually defending the Third Reich?
Which would not have really stood out to me, except I had just read this earlier:
"On the contrary, precisely because they are iniquitous the Church makes an urgent call for freedom of conscience and the duty to oppose.
"A law as profoundly iniquitous as this one is not an obligation, it cannot be an obligation. One cannot say that a law is right simply because it is law."
He called on municipal officials asked to perform gay marriages to object on grounds of conscience and to refuse to go through with the ceremony, even if it meant losing their jobs.
He said: "They should exercise the same conscientious objection asked of doctors and nurses against a crime such as abortion.
"This is not a matter of choice: all Christians... must be prepared to pay the highest price, including the loss of a job."
"The highest price" seems to stop short of not joining an army whose cause you don't believe in.