Other than his closest friends, it is unlikely that anybody would complain if a Guardian cartoonist drew Boris Johnson as a gorilla. All’s fair in political satire, cartoonists are expected to be scurrilous, and the former prime minister is fair game. But if that same cartoonist drew a black politician in simian form, it would be obviously racist. This is the principle to hold in mind when decoding Martin Rowson’s cartoon of outgoing BBC chair Richard Sharp, who is Jewish, in Saturday’s Guardian. Centuries of anti-Jewish caricaturists (and to be clear, I do not accuse Rowson or the Guardian of...