I want to know the answer to the following question:
Which other large religion also exist in Alsace due to the once German presence?
All the background I'm provided with is that "This divergence in policy from the French majority is due to the region having been part of Imperial Germany when the 1905 law separating the French church and state was instituted (for a more comprehensive history, see: Alsace-Lorraine).". Is that enough to answer the question?