Others have commented on Jewish ethnicity vs religion, but I would also like to add that this article is about events in the 1930s. Shortly after, the Holocaust[1], an event in history particularly known for the death of millions of Jewish people, took place in the 1940s. Adolf Hitler was appointed in 1933 and there was a buildup to the Holocaust and World War 2, so the context that they were Jewish in the 1930s is pretty significant.