I'm not sure how much this has to do with the family and their religiosity as Catholic Silesians.
Soon after the creation of the German Empire in 1871 (led by the Prussians), Otto von Bismarck launched his 'Kutlurkampf,' against the influence of the Catholic church in German territory. This took place mostly in Silesian and Prussian regions, as opposed to Catholic Bavaria.
A Wikipedia article can be found at: http://en.wikipedia.org/wiki/Kulturkampf
How much this has to do with the families leaving Smicz/Schmitsch I cannot say. From what I have of my family history, it says Albert Hindera left in 1879 at age 17, as the next year he would have had to join the army. Whether this was from a moral or religious objection I do not know. But as it is mentioned, it must be of some importance. His parent emigrated some 10 years later in 1888/1890.