oh boy! Give the book a break. It was written a million years ago. Those things do go out of date, you know? Maybe the guys who wrote it were the smartest people at the time, but for fuck's sake, they may have got it wrong. Take Aristotle. He was bloody smart but he misunderstood his own outstanding brain; the guy thought that it was an organ to cool the blood. They get it wrong sometimes.
Who the hell gave those other turd-brains the right to make you sing something you don't wanna sing?
nationality and religion. Why do people expect you to be loyal to choices you never made?