No, I think we have a pretty good idea of what England means to Morrissey. He's been railing about it for years. Also, I don't know how old you are, but if, like me, you are at least a few decades younger than Morrissey, you ought to consider that he has seen more of England's changes than you and I. As he says, "It may be shocking to some"-- that is, to people who may remember a very different kind of England. Finally, I suppose it needs to be pointed out, although it shouldn't, that Morrissey has always loved England and hated parts of it as well. His love of country has always been qualified. One listen to "Irish Blood, English Heart" proves that. He isn't some nationalist zealot.
Sorry to go on like this. I know you have a unique perspective, being second generation yourself, but let's try and fix on exactly what Morrissey has said and not said. I've been reading Morrissey interviews for twenty years and this is, by far, the most direct and sensible statements he's ever made on subjects like immigration and racism. As he says, he is a cosmopolitan man now. He's earned the right to lament the passing away of the England of his youth.