I know it's probably not proper to answer a question with a question, but why would you think this? You must have some evidence to present that would give us some basis for our answer. For example, do you think that Ilse's (doing somehthing or other) shows that she is a Nazi sympathizer? I have read the book several times both alone and with students, and no one has ever suggested this before. Perhaps you could provide some additional information and we could talk about it.