It is one of those multi-dimensional disputes in which one conflict slams into another. One of those conflicts is a straight ethnic one – familiar to anyone with a passing interest in Northern Ireland – between Germans and Frenchmen. The other is between the German military and Germany’s burgeoning democracy.
So far, a German officer has been rude (or has he?) about the Alsatians and there’s been a riot. There will be further riots followed by votes of no-confidence in the government.
The point is that it served as a reminder to the French that Alsace had been lost in 1870, while in Germany, it demonstrated that democracy was advancing at the expense of the military. I believe that fear of losing their privileges was one of the factors that led Germany’s rulers to go to war.