Answer:
Well, an ethnic group is a religion associated with a group of people. So you could say that is sometimes consistent, or inconsistent, with the groups migration/movement to different areas. Also take into consideration that Jews, throughout history, have been blamed and targeted for many things and were even sometimes forced to move to new locations. Some people might have even been afraid to continue practicing their religion because of how they would be treated.
I am not referencing just the Holocaust either. It has happened before, like during the Black Plague. Jews were blamed of poisoning community wells and were attacked because of this rumor.
I have no idea if these are the answers you are looking for because I didn't see a map, but I hope this helps in some way! :)
Explanation:
(Also, is there supposed to be a picture of a map?)
