Huh? How is it vile or toxic for my reaction to be "oh shit, this is going to end badly" when it was obvious (to me) that the cultural gap between these two people was so glaringly huge? And, before you say anything, nothing to do with race (I'm neither British nor white myself). They come from totally different worlds. TOTALLY different. He's the embodiment of privilege, literally (en)titled, never had to lift a finger, barely scraped an A Level despite the best education and nepotism money and connections could buy, never had to earn a living, never had to budget, ALWAYS had a huge cushion between him and the "real" world, never had to think for himself or make consequential decisions for himself, always been buffered and picked up after.
She, on the other hand, had worked her way to wherever she was. While not raised in poverty (seems like she had a fairly middle class upbringing), she certainly had first hand knowledge of household budgeting, of earning a living, of auditions and rejections, of striving and working for what you have. She will have had to do tonnes of things herself and by herself, without lackeys or assistants or people watching out for her, knowing nobody is going to provide for her (I'm assuming, maybe I'm wrong). She's a walking, talking mega-brain and high-achiever on sticks compared to him!
And yet, she chose THIS man - this numpty son of the future King of England - to marry. Having been married before! Why? Why on earth would she put herself through it? I wonder...
I know many, many, many cross-cultural marriages. Some inter-racial, some not. In my experience, race doesn't matter as much as cultural differences. Whether those differences are in wealth, education, mores, values, traditions, language, living as partners with so many differences on top of the issues all marriages face, is NOT easy. In many, many cases, it's been my experience that they fail. Hence my reaction: oh shit, this is going to end badly.
What, specifically, about this is toxic or vile? I can't understand. Are you saying it's toxic not to have fallen for the rags-to-riches, fairytale romance, girl loves boy who happens to be a prince, tale? Why is your reaction so extreme as to warrant such strong adjectives as "vile" and "toxic"?
Finally, you don't know anything about me! You don't even know who I am 😂