Re Alsace-Lorraine: the inhabitant there had begun to identify with France more or less after the French revolution. Before that French rule in Alsace had been relatively mild: most of these institutions which had been in the German era before the 17th century were maintained, among them the university at Strasburg.
Plenty of Alsatians and Lorraines began to identify with France after the revolution and Napoleon. Though this was more the case among the more educated parts of the population; the more rustic population still stuck to its culturally German ways and its German language.
So one could say that in 1871 the opinions of the locals were divided, just as they were not unanimous in 1918.
Its true that they were fine with being part of France after a time....though they didn't like the way the government stepped hard on the Catholic church, on Catholic education, etc.
BUT
They were also just fine with being part of Germany again after 1871. You did not see any resistance or protests to it in Elsass-Lothringen. They were perfectly content doing business (Germany was a strongly rising economic power) nor demands for French to be spoken, etc. They thought of themselves as German and seemed perfectly content with that. The only objections/resentments came from France, not the locals.