Thane Rosenbaum, right, spoke about the rise of anti-Semitism and the growing threat of Muslim extremism; with him is Congregation B’nai Tikvah’s Rabbi Robert Wolkoff. Photos by Debra Rubin Rosenbaum, left, signs one of his books alongside Danny Greenberg, B’nai Tikvah’s activities vice president. Thane Rosenbaum fears a “déjà vu” of the 1930s may be taking…