You do know that basic principles of freedom are not common in THIS culture, right? That's why we have a drug war and socialism and crony-capitalism and domestic spying and everybody knows it and nobody CARES!!!! I'm really wondering where people get the idea that Americans are paragons of libertarian virtue that is being diluted by immigrants. I see no evidence of that whatsoever.
I am surrounded by Mexicans in my job and my community and I have never noticed any of this. Or perhaps I just don't care if I am included in everyone's conversation all the time?
By the way, you didn't answer my question. What major problem in the USA will be cured by increased border security such that this issue needs to be front and center in the national debate?