I am having a difficulty writing strong and moving thesis statements. thank you.
Well, it does not have to be "moving" to be a good thesis statement. It has to be meaningful, though. To be meaningful, it must be an insight that came to you after careful, deep, inspired reflection. That is not hard; you do it every day. But can you do it about this topic today? That is the important question.
What are you really saying about the book?
...by challenging their instincts and pushing them furthermore in preparation of wartime. ------- the word furthermore is confusing here. People usually use furthermore to mean "and another thing I wanted to say is this"
I think you should skim through the chapters again while pondering this question:
Why does the author choose the details s/he chooses?
That way, you will come up with a thesis sentence that really makes the reader think. Like this:
The author describes the Super Suicide Society as ________, _________, and _____________, because s/he wants to show _______________.
I'm sorry if that is completely unhelpful! I hope it helps you. The idea is to say something original, something that maybe no one ever said about this book.
:-)