A brain is a society of very small simple modules that cannot be said to be thinking that are not smart in themselves. But when you have a network of them together out of that arises a kind of smartness.
Smartness runs in my family. When I went to school I was so smart my teacher was in my class for five years.
For those who have come here illegally they might have a transition time to allow them to set their affairs in order. And then go back home and get in line with everybody else. And if they get in line and they apply to become a citizen and get a green card they will be treated like everybody else.