You illustrate my point well. This huge increase of imports replaces the domestic Mexican productions which was very "inefficient" ie it provide subsistence for the millions of farmers/peasants. It was the fundation of their life for countless generations (many of them being in business before Columbus!).
Now they are made redundant - the flood the cities and part of this huge human wave is crossing the US southern border. According to the free market ideology it is a great thing - it improves the bottom line of transnational agrobusiness, it lower consumer prices a little and provides a lot of cheap labor in cities. The destruction, dislocation, hidden costs and destabilization are not calculated by the freetraders since their calculation formulas are too primitive to take into account more than couple items.
You think that it is noble and pious on you side to disregard lowly Mexican peasants or US taxpayers/woekers or the future of both countries so long as the false dogmas of free market cult are adhered to.
And I'm sorry to say this, but our President (who I supported 100% against his alternative, and still would given the comparison), is the perfect salesman for the globalists. Don't just listen to the speeches - check the legislation he signs and steers, as well as Executive Orders. He's lulling us into complacency - but the border issue tells it all. There's no gray area there - you either want open borders or you want them sealed. Open borders = globalist outlook.
It's no different than having a burglar in your home while you are sleeping - they have to move fast, and quietly since they are unarmed. Once we wake up and grab our guns, they're screwed.
WAKE UP!!!!