Open this photo in gallery: Members of the Jewish community hold a vigil for the more than 200 Israelis, including 30 children, held hostage by Hamas, on Parliament Hill in Ottawa, on Oct. 28.DAVE CHAN/AFP/Getty Images Prime Minister Justin Trudeau’s newly appointed envoy on combating antisemitism is facing criticism for failing to speak out publicly about rising attacks and intimidation of Jews in Canada since the Hamas attacks on Israel. Many Canadians, concerned about the upsurge in antisemitism, say they are baffled about why Deborah Lyons has so far not taken to social media to offer the Jewish community public...