The 13th Amendment abolished slavery.
The reason for the Trojan War was to kidnap Helen back. She was the wife of King Menelaus, until she was kidnapped by Paris, Prince of Troy. Then the war started to bring her back to her husband.
They just cross the borders like others
I believe the answer for this one is that the Nazis blamed the Jews for social, political, economic conditions in Germany. The Germans would soon take it to the extreme, and "punish" them by committing one of the worst crimes possible, genocide, because of the Anti-Semistic views.
