BBC : Broadcasters of British Caliphate

Fake news. She married her brother not her cousin.

Keeping it in the family

Highly unlikely, if not impossible (at least according to the Shariah (Islamic law)). It is explicitly forbidden to marry siblings in Islam.

See eg Q4:23:

https://quran.com/an-nisa/23

Marrying first cousins is permissible but not required, nor is it necessarily or universally encouraged. It varies a lot by culture and region. It was also normal in much of the world for a long time until fairly recently and still actually remains legal across the world including most of Europe, even if it's not exactly common in the West these days.

(See image. Blue is countries/states where first cousin marriage remains legal. According to Wikipedia, anyway, although that map is probably a bit out of date.)

There is some increased genetic risk so it's probably not a good idea, especially over multiple generations, and has generally fallen out of fashion in places where it was once commonplace. But it is not a crime even in most developed countries. However, some countries have debated introducing restrictions.

Also, Islam, socialism and being a "liberal" are not the same thing and if anything there is often a lot of incompatibility between all these sets of beliefs.

Prince Harry married his Cousin, Trump and Hillary are cousins. Dick Cheney is related to Obama. 100% US Presidents are related to the worst King in England. Coincidence?

Harry and Meghan are first cousins? Wow, every day's a school day round here. 🤣 Harry does have quite a few cousins actually (I think 18 first cousins but don't quote me), but none of them appear to be related to the Markles. Unless Harry had a secret affair no one knows about...

On a very sad note, his and William's first cousin once removed, Rosie Roche, was literally just found dead at only 20 from an apparent self-inflicted gunshot wound. 🙏

As for Obama, yes, he is actually distantly related to Dick Cheney if you go 8 or 9 generations back, and also apparently shares a family tree with George Dubya, Harry S Truman, and Lyndon B Johnson, among others.

As for the King John thing, I'm not a geneticist, but apparently it's not as far-fetched as it sounds. Everyone in the US with some European ancestry may well share some link to a bunch of famous people including monarchs.

Go back far enough, and we all have millions of ancestors because each generation doubles as you go back in the family tree so the number of ancestors goes up exponentially. 2, 4, 8, 16, 32, 64, etc.

(It would actually be far more: go back 30 generations and you'd technically have over 2 billion theoretical ancestors, more than the global population at that time. But due to a common phenomenon known as pedigree collapse, which means when people marry and have kids with people they're actually related to (even distantly), the real number is far lower.)

But after a dozen or so generations, the DNA is so "diluted" as to be effectively meaningless.

So not so much coincidence or conspiracy as just the marvels of math and genealogy.

TL;DR: We're all one big happy dysfunctional family lol. No wonder we fight so much.