I have no problems with English nationalism, it's their Imperialism which bothers me, for instance when The Barmy Army or whatever group of English fans wave the Union flag with England emblazoned across it. The use of St George's flag is to be encouraged. They don't seem to realise that England, along with Scotland, lost its independence almost three hundred years ago and is not a nation state. They have no individual parliament nor individual monarchy but behave as if they have. They cannot think in British or UK terms .. ask an Englishman to name a city in the N(n)orth and he'll probably answer Manchester or Newcastle. Ask a Scot to name a city in the S(s)outh and he'll probably say London ... or Manchester! The monarchy has always taken English titles rather than British.
The sooner England learns the difference between Britain and England the better for all concerned.