You keep trying to make the argument about immigration and who you should let live in your country.
We were talking about rights, weren't we? You're trying to tell me that migrants have the right to go where they like. I'm pointing out this isn't true.

My point was regardless of whether you want these people, they're there.
The migrants who are already in a given country, yes the host nation has responsibilities. That includes feeding, cleaning and processing. I agree with you there. But a nation does not have an obligation to admit migrants from a safe country, and Mexico is a safe country.