How did Polish immigrants react to a Lithuanian priest at their Chicago parish, St. Stanislaus Kostka? What does this say about relationships between immigrant groups in Chicago and other Gilded Age cities?

apparently they expedited his return to Pennsylvania by roughing him up... unfortunately, no name is given in the PBS documentary to allow further research, although I did find a Rev. Peter (Piotor) Koncz (Cuenz), originally from Lithuania, who was a parishioner at St. Stanislaus Kostka Parish in Baltimore, MD around 1871 who also preached in Pennsylvania at one point.

Explanation:

Immigrant groups were often in conflict with one another despite unifying elements such as religion, as basic survival instincts and competition for improving one’s position in society took precedence. Many came with few material possessions and saw America as a land of opportunity where wealth can be made from scratch. Unfortunately, many were swept up in the industrial capitalist machine and did not see the riches they imagined, though their children tended to fare better.

its many islands, high mountains, and remote peninsulas isolated population centers.