Mexico worried about migration back to the Homeland: Why should we care?

Seriously, I need some help with this article and the premises set forth as the problems Mexico will face if millions of their people turn around and leave the US for their homeland.

1) How is this the US's problem?
2) Why should we care?
3) Shouldn't Mexico and the rest of Latin America figure out a way to take care of their own people and economies?

The author's tone that the potential troubles for Mexico as a reason to not take a stance on illegal immigration just doesn't do it for me.

I am a believer of charity takes place at home first. We must take of our own, jobs and growth first before we start worrying about every other sovereign nations' issues and or problems.

#AmericaFirst
#MAGA

AP via NOLA.com

quote:

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Under proposals put forward by President-elect Donald Trump, Mexico could see millions of people streaming back with no jobs available; the country might lose some of the billions of dollars in remittances sent home annually; and some jobless deportees could swell the ranks of drug cartels, sparking more violence

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