Which question might a reader ask to get a better understanding of Paul Moschella's experience on Ellis Island as described in the "Ellis Island Oral History Project" excerpt? Does he like ham and cheese?
What did he expect to eat for lunch?
Did he have to pay for the sandwich?
Was he surprised that he liked the sandwich?

The answer is "he was bad enough in all conscience, but the devil himself could not temp him to turn slave-trader. satirical is a synonym for sarcastic. so when the author says that tom walker could not be tempted by the devil he does not literally mean "the devil" but he means that he is too morally upright to become a slave-trader.