I will not say Mexico is is bad as Fidel was, in this regard.  However, I expect that if you go to just about any border town and ask if undesirable Mexicans are in town, I bet you would get a hearty confirmation, that there are.   It has also been known for a while that part of the way Mexico handles it's economy is by encouraging people to move north.   

By the way, do you think Mexico should be trying to manipulate our election as they are trying to do in an article I posted earlier?   This is also one of the ways they are dumping some of their people into our country.   Should not a country's embassy be promoting citizenship in their own country instead of helping their nationals becoming citizens of another country.