Ratzinger, the Herald of Judaism|
August 19, 2005 - During his visit to the synagogue of Cologne, Benedict XVI received the gift of a shofar, the ceremonial horn sounded to announce the New Year and call the Jews to prayer.
Since Ratzinger has been a long-time defender of the errors of Judaism and its supposed messiah, and follows its method of interpreting Scriptures, in many senses he can be considered a herald for the Jewish religion. Therefore, it seems appropriate for him to receive a shofar from the Jews as a symbol of his past help and expectation of the "new year" he may bring them.
For more on the topic, read
The Biblical Commission on the Jews:
Changes in the Doctrine and New Anathemas
Below, a religious Jew sounding the shofar.