Hence the 'if I understand correctly' and 'reservedly bad' comment Allan. I understand the OP to mean what you describe as 'bad nationalism' and not all nationalism. I am in full agreement with your sentiments in the last paragraph but, unfortunately, nationalism as you describe seems to have attracted more than it's fair share of the other type. I am sure he will correct me if I am wrong but I think it may be the type of nationalism engendered by 'The Sun' and other such organs that he is referring to.

Maybe the word has now been twisted too far and we need a new one? Or, better still, maybe the bad type of nationalism should find it's own!

D.