Some scholars, such as Mark U. Edwards in his book Luther's Last Battles: Politics and Polemics 1531–46 (1983), suggest that since Luther's increasingly antisemitic views developed during the years his health deteriorated, it is possible they were at least partly the product of a declining state of mind. Edwards also comments that Luther often deliberately used "vulgarity and violence" for effect, both in his writings condemning the Jews and in diatribes against "Turks" (Muslims) and Catholics.
What does Mark U. Edwards claim as a possible cause of Luther's antisemitism? What about Luther declined as his antisemitism increased? What kind of affect did Luther often use in his discourses? Who else did Luther use violent rhetoric towards? What is the title of Edwards book about Luther?