Hugo Rifkin (on Question Time Extras – via iPlayer so you won’t be able to see it…) claims that English nationalism is distinguished from other nationalisms by “being about keeping others out“. This, he contrasted this with other nationalisms which, he said, “seeking to raise up rather than excluding“.
If most nationalisms are similar in someway, I think it is more likely to be not so much raising up as opposed to excluding others, but about expansionist building out (think Sudetenland).
If English nationalism is simply about wishing to remain English – leaving individuals, families, friends, and their collaborations to live as they wish and not usurp this role for State, then that seems a source of greatness to me. And rather a proud source at that.