Career
He wrote Eine Geschichte der Juden published by Rowohlt in Berlin in 1931 (translated into English, Hebrew and Dutch). According to Douglas Reed Josef Kastein was a "A most zealous Zionist historian.. who holds that the Old Testament was in fact a political programme, drafted to meet the conditions of a time, and frequently revised to meet changing conditions.. and that the Law laid down in the Old Testament must be fulfilled to the letter." The Controversy of Zion Douglas Reed.