The Berlin Wall was built to keep people in, from escaping a communist prison.
A better analogy would be Israel's West Bank wall. We really need a wall, not a fence.
It's really too bad that we even need the fence. If Mexico's economy was operating at its potential and there was less political corruption, and if we enforced our immigration and employment laws, maybe we wouldn't need a fence. Lot's of "ifs". Under the circumstances, however, we need it.
No comparison, the Berlin Wall was meant to keep people in. This wall is meant to keep people out. I lived four years in Berlin while the wall was still in place, I know the difference. So did JFK:
"Freedom has many difficulties and democracy is not perfect, but we have never had to put a wall up to keep our people in, to prevent them from leaving us."
"While the wall is the most obvious and vivid demonstration of the failures of the Communist system, for all the world to see, we take no satisfaction in it, for it is, as your mayor has said, an offence not only against history but an offense against humanity, separating families, dividing husbands and wives and brothers and sisters, and dividing a people who wish to be joined together.
as I recall East Germany did NOT want its citizens to move West toward democracy while now we wish to defend it from being weakened from freedom seeking immigrants, maybe history will repeat itself.
These aren't "freedom seeking immigrants." They have come here for jobs and are sending back to Mexico over $20 billion a year. Some of them are also coming here to reclaim what they consider to be part of Mexico. If you can't see the difference between a divided country wanting unification [Germany] and an invasion from Mexico, I feel sorry for you.