Prager has had Ms. Jacoby on once or twice. She's not for any kind of wall/fence/barrier whatever. I was happy that Prager disagreed with her on that particular issue. Last time she was on Prager she was debating with a person on the other side of the issue--can't remember his name--probably from some conservative think tank. She kept going on about how a wall would be a negative message/symbol to send out to the world. She's a leftie.
Dennis Prager's style of discussion-- "clarity is more important than agreement" allows him to really expose people like her. She says she's against state sponsered multi-culturalism, but I think she just uses that as a cover to make her extreme stands seem more moderate, becuase she puts absolutely no energy into fighting against the former. He's great!