Fred Rosenbaum Fred Rosenbaum is the founding director of the former Lehrhaus Judaica and the author of “Cosmopolitans: A Social and Cultural History of the Jews of the San Francisco Bay Area” (University of California Press, 2009), among other books about local Jewish history. Recent Stories Feb 16, 2022 J.’s digitized archives are window into unique ethos of Bay Area Jews Jul 17, 2020 Trump’s stamp of approval helped re-elect Poland’s bigoted president Dec 22, 2003 Rabbi Saul White pierced armor of S.F.’s assimilationist mentality