It is the concern of a nation to prioritize the well-being of those who are lawfully it's citizens, as it is the mandate as apart of a nation stands to exist for. If a nation does not care for it's own people, and instead the citizens of another nation, that nation is failing to uphold the standards of nationhood.
Nationalism is when the ideal of prioritizing the needs of your people takes even more precident. While nationalism can be corrupted into forces that do harm, nationalism in itself is not evil.
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