Personally, I think this is related to the religious history and cultural history of Europe. I suggest you read Russell's History of Western Philosophy. Focus on reading Volume I: Volume II Catholic Philosophy Chapter I Godfather Chapter I Religious Development of Jews Chapter II The First Four Centuries of Christianity.

Quote a sentence from P387 in this book: "The outstanding difference between Jews and other ancient nations is their tenacious national pride. Once conquered, other countries will yield to the victors in the same way. Only Jews kept their self-centered beliefs and were convinced that their misfortune was due to God's forgiveness because they failed to keep their beliefs and teachings pure. "