Why do people say nationalism is a bad thing?

Why is it bad that we care about our own people's needs before the needs of people across the world? What's the point of even being a country if our own citizens don't come first?
>inb4 someone calls me a trump supporter

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in10RjFox · M

Its just the media that portrays it so.. like you are appreciated only if you help someone on the streets or in distress, but not when you help yourself or your kith and kin, to stay afloat.

I only go by the Airline oxygen mask. First wear it yourself, and then attend to others.

FearfulHarmonyReborn

@in10RjFox yup