What happened at Vimy Ridge is that a Canadian only corps fought  through a modern form of hell. The senseless slaughter for just another piece of cratered land, how important it may be to the generals, created a sense of brotherhood among those who came out of this massacre alive, mourning those who didn't. This sense of being one big brotherhood of suffering men, fighting for their brothers until death, gave birth to a national conscience of being Canadian not just British colonials.
Now why did they make this Vimy remembrance celebration an international event without the Germans being present?
This could have been a rightful Canadian only ceremony to remember the "birth of a nation" but this would have required a local ceremony without any politician being present. The way it has been conceived is a subliminal appeal to nationalism which requires an enemy. Is there another future sacrifice in the making that the public needs to be prepared for?  Western alliances drifting apart?