Dietrich Bonhoeffer (4 February 1906 in Breslau – 9 April 1945 in Flossenbürg concentration camp) was an important Lutheran pastor from Germany who was killed by the Nazis during World War II. He is known partly for his belief that killing Adolf Hitler was a moral act. In his early life he believed that all Jews should turn into Christians, but supported them anyway. He disagreed with the general anti-semitism and so created a theological college. He wrote a book called "The Cost of Discipleship" about following Christianity.