No he didn't. The tweet said, "He is a vile leader. He deserves a much worse fate. I'm thinking Mussolini." Many things happened to Mussolini, but the most important thing that happened was he was dismissed as Prime Minister and placed in custody because of criminal actions he committed, this was the end of Mussolini as an independent entity, and if this is what happened to Trudeau I think it would be completely just.