I don't know who it is either, but it's not a mere fantasy. It's pure, cold, hard power and influence calculation.
The old British Empire died in the 1950s, but a rump globalist/neo-marxist one remains in London, and its organs of power are the Commonwealth (and control / nfluence in places like India, South Africa, and Canada) the City of London finance, MI6, the BBC/media, and Britain's long membership in, and control of, many international and global institutions.
Who is most in position to benefit from open borders, and an atomized, 3rd world, post-modern decayed West?
This influence also even extends deep into the US Government. If you doubt that - think how MI6 and Christopher Steele, via their American proxies and allies, were able to run an operation that nearly took down a President of the USA.
In some respects this mess reminds of the Prussian elite’s approach to Hitler. Hitler was uncouth. But he was also a useful tool of the elite.
The ultimate Prussian, Paul von Hindenburg, even appointed Hitler chancellor.
Well, Hitler turned out to be not the Prussian’s puppet, but the Prussian’s master.
Same with happen with the British elite and their Muslim immigrants.