A little joke with my Mexican friend

Gabe: I heard Tibet was not part of China until 1644. But I won't judge China for this, because it was just like what America did to Mexico.
FF: I heard more than half of Mexico was taken away.
Gabe: True.
...
FF: That's why people in Mexico are complaining?
Gabe: True
...
FF: About "why not American took us all so that I wouldn't need to smuggle in"?
Gabe: (Throwing tacos to me)