Good post.
I can identify with quite a few of your observations. I'm not sure exactly when my ABElism started tbh but it was probably inherited from my father, and might have had something to do with Tony Greig and grovelling.
As you said, and I agree and have said so myself, the England team and management have conducted themselves well, but that's how it should be anyway and imo not really worthy of particular praise. Yeah they behaved themselves, jolly good. Where I might disagree with you a bit is with the fans. Now of course the majority of fans are ok, however, there is a significant element of English supporting culture that is of the laddish beer drinking variety which I find disgusting and is one of the things that reinforces my ABElism. We had an example of that nonsense local to where I live...and this was when England WON ffs...
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Mayhem in Nottingham city centre as fans celebrate England shoot-out victory
Slightly related to that, many of you will have seen the stuff about domestic violence circulating on the web...
...I realise that this isn't something unique to England, but it is significant. There is a good example on this thread of the sort of ugly nonsense that happens when too much beer and sore losing football fanatics mix.