The authors––two sociologists and one historian––study the complex situation of Jewish communities in Germany integrating an immigrant population of Russian speaking Jews far more numerous than their original members based on the findings of a three-part empirical survey carried out in 2008 and 2009. For their analysis, the authors apply the concept of a transnational diaspora familiar to migration sociology. This allows them to focus on multiple origins, ties and affiliations at once. A further useful concept is that of insertion, here standing in for the more familiar one of integration. The authors, Eliezer Ben-Rafael, Olaf Glöckner & Yitzhak Sternberg, argue that integration would imply goals such as cohesion and coherence, which Germany’s Jewry today lacks.