What connection might there be between madame Schacter's treatment on the train and possible future events in the concentration camp? What are some other ways that Wiesel Foreshadows, or hints at, the horrors ahead?

This is really Wiesel foreshadowing the horrors that await the Jews as they approach the camps. The others naively believe they are going to a better place and they beat Madame Schacter for her horrifying prophesies. The fires in the sky will become the new reality for these people. Turning against each other will become a matter of survival when they reach the camps.