Complex sentence: The prevailing view among historians since World War II is Luther's expressions of anti-Jewish sentiment have been of major and persistent influence in the centuries after the Reformation although they were largely ignored in the 18th and 19th centuries but embraced by anti-Semites in the 20th century.
Split into simpler sentences: The prevailing view among historians since World War II is Luther's expressions of anti-Jewish sentiment have been of major and persistent influence in the centuries after the Reformation. Although they were largely ignored in the 18th and 19th centuries, they were embraced by anti-Semites in the 20th century.