This excerpt is from Our Country, by Reverend Josiah Strong (1885).
...
immigration not only furnishes the greater portion of our criminals, it is
also seriously affecting the morals of the native population. It is disease and
not health which is contagious. Most foreigners bring with them continental
ideas of the Sabbath, and the result is sadly manifest in all our cities, where
it is being transformed from a holy day into a holiday. But by far the most
effective instrumentality for debauching [corrupting] popular morals is the
liquor traffic, and this is chiefly carried on by foreigners.
What "diseases" did Strong blame on immigrants?