In 539 B.C., the Chaldeans were conquered by the Persians. The Persians allowed the Israelites, now known as the Jews, to return to Canaan and rebuild their temple and cities.
Many Jews chose not to return, instead remaining in Babylon. By now, they had built homes and lives among the Chaldeans. Other Jews chose to immigrate to other lands. As they did so, they retained their Jewish culture and bloodlines.
Thus, though they were outside of their homeland, they remained connected as a part of the Jewish people.
Our credulity is greatest concerning the things we know least about. And since we know least about ourselves, we are ready to believe all that is said about us. Hence the mysterious power of both flattery and calumny.
American cowboys often sang to their cattle at night to calm them down.