Open this photo in gallery: Speaker of the House of Commons Anthony Rota leaves the Speakers Chair after announcing he will step down as speaker in the House of Commons, on Sept. 26.Adrian Wyld/The Canadian Press It took four days for Anthony Rota to resign for leading the House of Commons in applause for a man who fought for a Nazi unit. The inevitable finally happened Tuesday afternoon. Mr. Rota’s transgression was not ethical, but intellectual, in that he didn’t know – oh, how he should have – that the Ukrainian Second World War veteran in the visitors gallery that...