Jim:
Brexit was sold to the British people on the "lets stop immigration" ticket - the banks and commerce all opposed it on economic grounds - there was no other articulate argument put forward other than to stop immigration.
State that as often as you wish, but it will not make it true.
Many people voted to leave because they do not wish to be ruled by Europe (Just as you seem to wish Ireland had self-determination from Britain).
It suited the remain campaign to try to paint those in favour of Brexit as racists who wished to stop all immigration. That was never the case.
I accept that some who voted for Brexit may have done it for xenophobic reasons, but it is totally inaccurate to state that that was the sole reason.

A month or so ago, The Bank of England issued a statement declaring that the basic standard living of people in Britain (real people - not entrepreneurs, bankers and the elite) will continue to be effected adversely for at least a decade
Yes, and we all remember the Bank's scare stories before the Brexit vote. (Since recanted)