Complex sentence: Russian Jews in particular had been far more excluded from Russian society than German Jews from German society, for both linguistic and social reasons, and, unlike German Jews, the Jews who founded Beth Hamedrash viewed both religion and the synagogue as central to their lives.
Split into simpler sentences: Russian Jews in particular had been more excluded from Russian society than were German Jews from German society, for both linguistic and social reasons. Unlike German Jews, the Jews who founded Beth Hamedrash viewed both religion and the synagogue as central to their lives.