I did not answer my own question. I did not say we cannot stop them rather that we should not be making it easier.
My point is that we should not be making it easier as they are not just “visiting” like the Canadians or other tourists are they are here illegaly taking as much as they can and with their birth rate of anchor babies becoming a voting block that will eventualy overtake us.
Should we be making it easier for us to lose to illegals?
You are wrong about their government not allowing them to leave. We are fast becoming the safety valve for their failed society. The Mexican gov encourages their leaving and sending back tens of billions of dollars. It is their second largest source of income after oil.