If the US had been smart, we would've bought the Iron Curtain off of the former communist countries at the end of the cold war.
If we had done that, we would have probably 10.M fewer illegal Mexicans here.
Our wages would be higher and our rent/mortgages lower, not to mention less crime. 
The east block built that wall, partly to prevent people to escape to the west. (The short version).
Yes, I know. I visited the Iron Curtain in the spring of 1988 somewhere in northern Germany. We got a 2 hour lecture on the history of it and I remember enough.
Do you see an analogy?
No, not at all. The Iron Curtain was built to keep its people from escaping to the west, not to keep westerners from invading in order to enjoy "the workers paradise".
Mexico hasn't built a wall to keep its workers from escaping because the Mexican economy has become dependent on Mexican nationals working and living in America, and sending their money south of the border to subsidize their corrupt political/economic structure.
If this flow of money was to be cut off, Mexico would either collapse, because the masses would no longer have enough money to live on, or they would have to enact sweeping reforms to root out the corruption that has had a stranglehold on their political system for roughly 70 years now.
The status quo can't continue. America needs to quit feeding Mexico's dysfunction.
That's pretty clever Pappy, relating Trump's wall as a metaphor to the Iron Curtain as a metaphor.
I wasn't doing that. The two situations are almost opposite, I don't see how anyone could make the connection if they looked at the 2 situations in anything other than the most simplistic terms.
Agree re wages and property/rent prices. You gotta think about who in first world countries actually benefits from immigration. It ain't the working class or the middle class.
Exactly. That's the message that Caesar Chavez had 60 years ago. He hated illegal immigrants because he considered them to be union busting scabs.
