Open this photo in gallery: A spokesperson for Justice Minister Arif Virani says that when he appointed Birju Dattani as head of Canada’s human rights commission, the minister was unaware of tweets Mr. Dattani had sent.Spencer Colby/The Canadian Press Jewish advocates have raised concerns with the Justice Minister about whether he fully vetted the new head of Canada’s human rights commission after it emerged that Birju Dattani posted links on social media to articles comparing Israelis to Nazis, and Palestinians to Jews incarcerated in the Warsaw Ghetto. Shimon Koffler Fogel, president and CEO, Centre for Israel and Jewish Affairs, met...