Briefly:
Thinking about Sasha Baron-Cohen and Woody Allen as Jewish comics and as Zelig. Allen begins visibly a Jew laughing at and with/for Jews. Baron-Cohen's Jewishness is used as secret knowledge; he's invisible, the old anti-Semitic trope, while Jews are the one group he hasn't mocked. Also unlike Allen, he takes his religion very seriously. Allen is egocentric but self-deprecating, if only under strictly controlled circumstances. Baron-Cohen under the same circumstances is moralizing and sadistic.