It is an insult to compare the law abiding, assimilating, immigrants of old, my ancestors included, and for that matter, those who use legal means to enter America today, with the hordes of law defying people who refuse to assimilate and demand a full range of welfare services and rights that do not exist in their native lands. The most radical of them demand that the Southwest become "Atzlan", separate from the United States and united with Mexico. At the rallies, Communist and Hispanic racist banners were quite evident, unless you get your news from the MSM.
The United States is a nation, just as Mexico, Italy, Nigeria, etc. A nation is defined, in part, by physical borders. It is not a public space for everyone on the planet who wants to come here. If you don't like the idea of national sovereignty, perhaps you would be more comfortable over at DU, where your co-thinkers reside in great numbers.
This is one temporary solution...signs all across the border...might make them think twice before crossing over.