I agree and it will probably be necesarry eventually. Right now it probably isn't politically feasible as it will wrongly be compared to the Berlin Wall.
Self-deportation is the answer as in cutting off all non-emergency social services coupled with giving employers of illegals jail time.
Hopefully with this supreme court, we can get a bill through that will deny education to the children of illegal immigrants.
It's definitely feasible. It already passed the H.R. They're much closer to the views of the people than the Senate.