But we don't. And we won't.
Immigration from Mexico is 2.5 times that of Europe.
Immigration from one country, Mexico, is 2.5 times that of many countries combined.
I've taken the figures from the above table at cis.org and graphed them. Note the sharp increase in immigration from Mexico and how that differs from all other regions' increase. Note also the sharp decline in immigration from Europe while all other regions have increased.
Our immigration policy must serve our needs, our ability to absorb, and immigrants' ability to assimilate. Creating large sub-societies serves no good purpose.
Our security can not be conditioned upon the demands of unassimilated immigrants or illegally present foreigners.