"The US and Britain were joined at the hip for hundreds of years. The joint split."

Are you referring to 1776? The US fought a war of independence. It fought another war in 1812 when Britain tried to re-take America. I am not sure what you are trying to say.

"Now they aren't."

I have no idea what you are talking about here.

Are you saying the "special relationship" is no more?

Are you denying the existence of the "Five Eyes"?

Are you claiming that MI6 and the CIA do not work together?

"Ukraine is of no strategic value to the west as long as it isn't occupied by Russians."

That is simply untrue. Ukraine has been a strategic prize for the West ever since 1947 when the CIA started devising plans to weaken Russia by fomenting revolt in Western Ukraine.

https://covertactionmagazine.com/2022/09/12/ukraine-the-cias-75-year-old-proxy/

The idea of leveraging Ukraine to reduce Russia to a third-rate power was posited in 1997 by US veteran diplomat Zbigniew Brzezinski. He had formerly served as National Security Advisor to President Jimmy Carter, and he wrote a book called The Grand Chessboard.

https://www.globalresearch.ca/ukraine-pawn-grand-chessboard/5778417

In this book, Brzezinski wrote:

“America is now the only global superpower, and Eurasia is the globe’s central arena.” He adds “It is imperative that no Eurasian challenger emerges, capable of dominating Eurasia and thus of challenging America.”

The best and perhaps only way to achieve this goal, Brzezinski said, was to pry Ukraine away from Russia.

“Ukraine is the critical state, insofar as Russia’s future evolution is concerned.” He says, “Without Ukraine, Russia ceases to be a Eurasian empire.”

So you can see how it is imperative for the USA to keep the Ukrainians fighting and “bleeding” Russia - even if it is, as Senator Graham said, “to the last Ukrainian”.