Here are some topics/components you could write your thesis on.
1. Dehumanization of Jews / Symbols
2. The Three Prophets / Symbols
3. Messages of Hope / Symbols
4. Loss of Faith / Theme
5. Perseverance and Survival Under Trial / Theme
6. Loss of Innocence / Theme
Each of these topics/components can be taken in any number of different ways. Of course, the majority of the work is the second part of your homework: coming up with your opinion/analysis of the literary component. Be creative, specific, and thorough! Try not to summarize!