Here's the imigration situation I see (rephrasing from my comments last time)
Bobu from Ethiopia has saved about half of his above-average salary of $2/day for 5 years. He would like to spend that $1500 to get on a boat with his family of 6 (Bobu, Mrs. Bobu, and 4 junior Bobus), travel to America, and work his traditional 14 hour days, 6.5 days a week to make a better life for his family. If he stays, he knows that there's a 50% chance that one of his present or future children will die of hunger, violence, or disease before they turn 14.
Should the US government use force to prevent him from coming to the US in order to trade his labor for money?
Are there other questions in immigration? For sure. But the first question is the above...should the US government stop Bobu?
My core claim...if Bobu and his children count AT ALL...you don't reach the anti-immigrationist position.