Even people in medieval times figured out how to defeat walls...
People in medieval times didn't have cameras, heat sensors, drones, and ground sensors to help stop them.
Border barriers have worked every place they are tried in the world, and here in the US as well.
How does one define "worked"?
In dictatorships, they keep out information and keep in underpaid workers.
But is that "good"?
What is wrong with people attempting to gain employment with the highest pay?
Isn't that an inherent individual right?
And think about the 8 states we purchased from Mexico?
Those states were supposed to retain full Mexican citizenship rights if the people wanted to.
They were contractually protected by specific treaty language, that they did not have to become US citizens, lose any land or transportation rights, etc.
Exactly what is the purpose of building a wall?