system
Given the following post, respond as if you're commenting on Reddit:
human
[Gargoyles] Why did the British government allow David Xanatos to tear down a major historical site and transport it to America?

Even if the castle is privately owned, there are laws about what you're allowed to do to historical structures. Deliberately removing it piece by piece is against the law.
gpt
Well, look at where castle Wyvern sat before Xanatos decided to buy it. It was literally on the edge of a crumbling cliff, probably just a few decades away from falling into the ocean and taking all of its history and exquisite art (because who honestly believes Gargoyles are real?) with it. Aside from that, the castle had a VERY bad reputation for being haunted, which kept squatters away from it for a thousand years and prevented the government from preserving it themselves. The thing with most haunting legends are that they don't really keep people away, they're really just big tourist signs. But Castle Wyvern ACTUALLY kept people away. Nobody really studied it and no tourists came to the castle to spread its spooky history around. Nobody would have agreed to preserve it like all the other castles in Scotland, and it would have disappeared as a historical footnote without extraordinary intervention.

So Xanatos, with incalculable wealth and (alleged) bribes to the right people, offered to preserve the castle for the government. And he'd do it in a way that would excise the haunting rumors and let the nearby land be put to good use. If Xanatos was smart (which of course he is), he would have also run a massive PR campaign all through the country (and hell, the entire western world) to get popular support for his massive purchase. TV spots, printed ads, radio interviews, the works. If he got the general public on his side, offering to do what the government never did AND doing his part to preserve history, the people in charge of such things would be hard pressed to refuse him. (Also bribes. So many bribes. ALLEGEDLY)

EDIT: It also occurs to me that, even if Xanatos did all the stuff above, there probably would have still been protests and massive campaigns by citizens to stop him. But he's not subject to their laws or feelings, and he probably never set foot near the castle until the first day of moving, so he wouldn't have been affected in the least.