details?

You can always tell when there's a true fanatic in the room because the reasonable people start blaming each other for the "inevitable" consequences

From your post:

The UK voted for Brexit, you just cannot ignore its consequences. Deal with it

London handles transactions for nations and currencies around the world. If other countries had the same attitude the EU does, there would be no such thing as a "financial capital" because dollar transactions could only be processed in the USA, Yen could only be traded in Japan, etc. Nowhere would get critical mass and London wouldn't have any real financial services industry. It doesn't work like that.