Earlier quoted context omitted.
[flagged]
It's zero sum. You're hurting your fellow citizens by diluting their labor. You may think this is a righteous position, but from the perspective of a nationalist, you are strictly harming not helping your fellow countrymen, and therefore you set yourself up as their enemy. >only cares about And the prosperity of their own country. It is "selfish" yes. But a selfishness that extends out to their kin and their neighbor…
No more so than having children and growing the population that way, which is a concept the right generally supports ("family values", "pro life").
> "you are strictly harming not helping your fellow countrymen"
It's not like the right do things to help fellow countrymen; taking away rights ("pro choice"), scorning single mothers instead of helping them and their children, demonizing social welfare users as 'welfare queens', opposing 'free' healthcare, oppising livable wages, remove unions and removing the bargaining power workers would need to have good wages otherwise, worsening education and making it less accessible and more expensive. The society their actions move towards is one where wealthy people live off the back of a working class who grind for money and die when they aren't productive anymore, along with a militarised police force acting to keeps the poors in line, and a 'justice' system which lets the rich away without punishment. And you can see it in action when Texas power fails and Ted Cruz takes his family on holiday, or the needlessly cruel treatment the UK Conservative Party's Department for Work and Pensions does to disabled people.
Nationalism isn't "help fellow citizens", it's "given a region drawn on a map, inside good, outside bad".