Open this photo in gallery: The flags of Canada and Israel fly at half-mast at a community building on Oct. 11, in Ottawa.Adrian Wyld/The Canadian Press The Privy Council Office has launched an internal investigation into a senior public servant for posting anti-Israel sentiments on social media in the aftermath of the massacre of civilians by Hamas gunmen. Nisam Siddiqui, a former senior analyst at PCO who is now listed as a senior adviser at the Department of Fisheries and Oceans, accused Canada and other Western countries of aiding Israel in “war crimes and crimes against humanity” against Palestinians in...