From this story from the Times of London (which predates the election of Cardinal Joseph Ratzinger to the Papacy):
Unknown to many members of the church, however, Ratzinger’s past includes brief membership of the Hitler Youth movement and wartime service with a German army anti- aircraft unit.
Although there is no suggestion that he was involved in any atrocities, his service may be contrasted by opponents with the attitude of John Paul II, who took part in anti-Nazi theatre performances in his native Poland and in 1986 became the first pope to visit Rome’s synagogue.
He upset many Jews with a statement in 1987 that Jewish history and scripture reach fulfilment only in Christ — a position denounced by critics as “theological anti-semitism”.
Photo from AFP.