The British Royal family are primarily these days: British(Queen Elizabeth's mother was from British nobility, and Prince Charles married into British nobility as well aka Lady Spencer/Princess Diana), Greek and Danish(Prince Phillip, is from the Danish/Greek, royal families) and with a tiny smidgen of German left in them.

Just because, someone has an ancient ancestor from some part of the world, doesn't mean, that person has a significant amount of their dna left in them.

German monarch's, of foreign nations, have always been dutiful and loyal. The British Monarchy, claims German descent, from ancestors, well over 3 generations ago(Prince Albert, husband and consort to Queen Victoria).

It is like the Swedish royal family: descendants of a French General, Napoleon once contemplated having killed, and eventually betrayed Napoleon.

Is it any wonder, that the French pretenders to the Swedish Crown, are openly and brazenly betraying Sweden?

When the British monarchy, was damn near full blooded German, they served the interests of the British people, and aided in the rise of the Second British Empire.

As the British Royalty, became polluted with British blood, the monarchy returned to pettiness, corruption, and treason for personnel profit.