Anti-American sentiments are so robust in Canada that you apparently don't even have to be American to feel their sting — American-by-association will do. Take the case of Michael Ignatieff, the Toronto-born political scientist and human rights expert who spent the last couple of decades teaching at Harvard University's John F. Kennedy School of Government. When he returned to Canada late last year to run for Parliament, did he get a warm welcome home from the locals? Hardly. Ignatieff had to stand down hecklers shouting "American, American!" — and this was at the candidate nomination meeting for his electoral district,...