This is deep:
They are looking for an improved life that simply is not available to them in their home country of Mexico. They aren’t looking to take over anything, they just want a job where they are paid. They want something better for their children and grandchildren. They lust for our pay scale, our education system, our health care. The vision of their children being able to grow and prosper according to their own efforts is akin to Nirvana to them. So they come, legally or illegally.
Quite an informative piece.
Here, in close proximity to the border, even the most militant of anti immigration know the reality. All have sympathy for the wishes that drive people here. It's a pretty simple desire that drives them north.