Hi, in a search today, I came across your questions, and this terrific web page. The Ancestry entry is my tree, so here's a bit of information....
The Steins in my tree have so far been protestant, including Alexander Stein who was a practicing Lutheran. The town of Mernes is in Hesse, right on the border of Hesse/Bavaria which may be why the confusion in his obituary stating that Mernes is in Bavaria.
I have a bit of information about them both (Alexander and Elizabeth Roth) as they are my 3rd great grandparents, but have hit a bit of a barrier trying to find ealier information. If interested, let me know and I'll work to post or add information as I explore wikitree as I just joined today.
Best of luck in your research,