No, I have not read the book. But I will put it in my to read list. No I have not visited Germany, but currently I am reading a book about the six princesses of King George the 3rd. I was shocked to read how the English royals were mixed with the protestant English Monarch. I mean, I always knew The royal were all Germans but I had no idea to what extent. The Baden Wurttemberg-- and Brandburg were a continuous presence in the book. LOL The eldest daughter of the king was married to a prince from Wurttemberg. I wonder why the English are so linked to the Germanic people? Is the Entire English island a german indigenous people?
Basra , that dude was married to Charlotte of Mecklenburg (dutchess of a small german town and her father was King of Hannover.
You see, until Von Bismark's era in the middle of the 19th century, there existed no country Germany; there were dozens of saxon kingdoms; in fact, most of Europe's royal houses have origins in Germany. so, to answer your question; it is natural selection.