Wikipedia says, “The Jewish question, also referred to as the Jewish problem, was a wide-ranging debate in 19th- and 20th-century European society that pertained to the appropriate status and treatment of Jews.” We still hear the term batted around online today, some say as a euphemism for a prospective campaign of ethnic cleansing in the US.
An anonymous commenter notes that a post here last week may have inadvertently raised another sort of Jewish question, one that probably merits more than a quick answer in the comments of a post.