The CATO Institute has been promoting open borders and unregulated immigration for the sake of cheap labor under the pretext of free market capitalism.
Mexico is one of the world centers of Marxist ideology and theory. (Where did Trotsky go when he fled Russia?).
All you have to do is read the Hispanic press to see the seething undercurrent of the Marxist theory of exploitation. Mexican immigrants know full well they are being exploited for cheap labor and their Marxist masters fuel that ideology every day.
You may choose to go through life with blinders. I saw the anti-American, anti-capitalist sentiment brewing for years. I experience the Hispanic Marxist hatred for America every day.
Are you in Singapore? Maybe you should spend some time living in one of our border states to undestand what's really going on here.