[contentcards url=”https://cc.bingj.com/cache.aspx?q=Golden+Age+Of+American+Jews+Msn&d=4598548989928&mkt=en-US&setlang=en-US&w=YaCLTDhLnnU_3N7Ja0_Zduv-KOFAEHth” target=”_blank”] By Franklin Foer Anti-Semitism on the right and the left threatens to bring to a close an unprecedented period of safety and…