Having spent some time in Pakistan, I was amazed that the culture was so similar to that of Mexico and Central America.
The customs are similar, the food is similar (lots of rice and green chilis) and Pakistanis are similar in stature and coloring to "Latinos."
It would be the easiest thing in the world to come in through Mexico, and anyone who thinks it can't be done needs to have a brain transplant.
This is an area that needs to be WATCHED CAREFULLY and continuously!