Commiserations Pablo.
However, thanks for livening up the airline pilot world and showing us that there are still some characters out there.
The important thing is that, in exercising your judgement as a Captain, you did not endanger the aircraft. It might have been politically unwise to allow the passenger on to the aircraft - but it was not unsafe.
Falling out with an airline can be a bit unsafe for your career however. But then, a lot of airlines these days are run by complete gits so you are probably best of out of it!
Thanks for keeping us entertained - it makes a change from Michael O' Leary!