Not 100% sure what "Bionic Mosquito" is trying to say Mike, but as far as I can tell it it is not an argument for open borders as advertised.
The writer states that "common culture and tradition reduces the demands for coercive government", and raises an objection to open borders that they "will reduce common culture and tradition …and government will increase".
Unanswered by this apparent theory, however, is how the United States, historically a nation of immigrants who unlike people in most places did not share common culture or traditions, has also been among the freest places on earth? Or how the growth of government in the U.S. during the past century and a half has been accompanied by increased restrictions on freedom of movement?