 As "rosh yeshiva", Rabbi Weinberg emerged as a leading advocate of , the German approach to Orthodox Judaism, based on the "Torah im Derech Eretz" of Rabbi Samson Raphael Hirsch.Although "Torah im Derech Eretz" was "an ideology that he had openly opposed in his youth," Weinberg "championed" this approach during his tenure at the Hildesheimer seminary, and he "played and was to play a seminal part in the reconciliation of Torah orthodoxy with modernity.