Few events are as compelling as a pandemic, even a relatively mild one. Though nowhere near as severe as the 14th-century Black Death or the 1918 Spanish flu, Covid has drawn responses from every sector of society, spreading panic and undermining trust in governments. Little wonder then that throughout history politicians have sought to blame lethal new outbreaks of infectious disease on foreign “others”, hence the Victorian characterisation of cholera as the “yellow peril” and Donald Trump’s references to the coronavirus as the “kung flu”. Few groups are more aware of the consequences of these calumnies than Jews. In the...