The terrible implications no one is mentioning
So these "more advanced" people come from a distant land a forcibly take innocent people against their will to a far off land to labor for them.
Now I suppose that maybe the plane was going to crash any ways so they would have been dead. The movie didn't make this clear I was thinking maybe they were causing the crash. But even if they found planes that were about to crash and they saved the people, does that give them the right to kidnap them and take them to their time? If Europeans found Africans who were being mauled by lions and took them to the Americas to be slaves would that be ok?