Interesting theory, but it overlooks the numerous statements in opposition to that theory that the prince has made, e.g., "We are very much not racists!" Is the royal family out of touch with much of British society, and much of the world? Of course. Did the British government pusue a ghastly inhumane colonial policy? Absolutely. But the monarchy still appears to have some symbolic value to the British people (and Canadians, New Zealanders, etc.) and I am not sure that the statements or behaviors that you cited make your case. I don't see the kind of dog whistles that Trump was sending out to those following him.