"After the Judge's death, as World War II was ending and persecution against the Witnesses began declining, along with the attendant drop in news-media publicity, Hayden C. Covington told the author [of THE FOUR PRESIDENTS] that Fred Franz saw the prohibition against blood transfusions as a way to accomplish two things: to continue to publicize the religion, and to create an uproar in the community. This reaction would convince the membership they were being "persecuted" and "suffering for righteousness sake," a sure sign they were "in the truth."
According to Jerry Bergman, author of BLOOD TRANSFUSIONS: A HISTORY AND EVALUATION OF THE RELIGIOUS, BIBLICAL, AND MEDICAL OBJECTIONS, 1994, p. 5.