The book is based on the word of the Bible, which is God's revelation to mankind. The Bible talks about God's plan for the world He created. This book also explains Satan's influence on world history and the course of events. His attempt to prevent the fulfillment of God's plan.
According to the Bible, Israel and the Jews are God's chosen people. Israel is an important part of God's plan. So, it can't be just bad luck that the Jews have been subjected to so much persecution. Into whatever land they wandered, persecution soon began. There must be a supernatural and planned influence behind the events.