I can’t argue against the fact thar nationalism has helped AES countries in the past given that it is another tool in the toolbox and that material reality might have dictated its utility at the time but it is still something we rather abandon for the greater ultimate goal akin to religion simply because it inevitably draws borders between cultures and individuals and feeds racism and xenophobia. I think we understand each other. I’m sorry to say that healthy nationalism is an oxymoron IMO.
I don’t think “nationalism” is the correct term for what you are describing and I don’t like your condescending tone. Nationalism kills multiculturalism. People can disagree, what the hell?