Here is their exact justification:
The US is a nation of immigrants. Everyone living the the US is either an immigrant or a decendent of immigrants. Therefore the US has no right to keep anyone out of its country.
I respond to that fallacious argument in the essay, referenced: Immigration & The American Future. We should not, of course, just blame foreigners for having that distorted view. American Leftists have prattled similar nonsense in their effort to undermine our sense of whom we are. (See The Battle Over Patterns Of Personal Identification.)
The fallacy that I ridicule in saying that a nation is not a game of musical chairs runs into a lot of issues other than just immigration. It needs to be laid to rest.
William Flax
We need to fully fund the Border patrols and allow them to do their job.
We need to reform welfare, I argue that not only is it being abused by illegals, but by the native-born as well, and it abuses me along with anyone else forced to pay for people not to work.
We need to prosecute companies hiring illegal workers.
We need to challenge the current interpretation of the 14th Amendment which allows a woman to walk across the border and give birth to an American citizen.
All of that, along with turning back the greatest number possible at the borders (100% would be acceptable), and deporting legal immigrants convicted of felonies AFTER they serve their sentences.
Now, I don't know if Mexico receives any sort of foreign aid from the US, if they do, stop it, and route the funds to be used to secure our borders.
These are just my ideas, there remains the problem of the existing illegals in the country.