Do you have any facts to back up your conjecture? Because walls/ fences have been used for security purposes since the beginning of time. What has changed, or is different about the actual situation, to confirm that your conjecture is true?
You are correct that "walls/ fences have been used for security purposes since the beginning of time." However, like all human contrivances, they don't work perfectly and a lot of their success depends on what they are trying to keep out. Australia has a continent-wide fence to keep out rabbits that keeps out a lot of rabbits, but it doesn't keep out all the rabbits.
Humans are a lot tougher to fence out than rabbits. Israel has a wall to keep out Palestinians. It is really high and well patrolled. Palestinians don't climb over it but they get in other ways and the wall is tiny compared to the length of our desert border with Mexico. That border runs through urban areas in CA and TX where tens of thousands of people cross each day, most of them legally. There are tunnels and boat passages. If people want to get across badly enough, they will.
The fact is, illegal immigration from Mexico is already way, way down because of economic factors on both sides of the border. And the millions of
latinos in this country, most of who are legal or citizens, aren't going away. Add to that the fact that our rapidly aging workforce is already running short and WASPs aren't having nearly enough babies to keep us going. Immigrants, even illegal ones are a plus to our economy.
What the alt-right doesn't like isn't the illegal status of a fraction of our immigrant population, it is the multi-cultural nature of today's American society. This especially true in places where
latinos are a new and significant element. Nobody in south Texas is uptight about Mexicans. Michigan? The Carolinas? That's a different story!
It isn't just nativism that makes working class WASPs angry, they have lost income as wages have stagnated and lost their best jobs because of technology and the export of manufacturing to low wage nations under Republican "free trade." Immigrants, especially Mexican immigrants, are an easy target for their frustration. But they aren't the cause. The real cause of their declining status and income is the destruction of unions and laws which have encouraged the export of jobs. Those are Republican policies, not Democratic ones.
