I'm gonna guess that Medved sees some sort of disconnect between "close the borders" and fighting terrorism, if you take it in a very literal sense.
Would "closing the borders" have stopped any of the Sept. 11th terrorists? Well, literally it wouldn't have, but that's not what you meant when you said it. You also meant enforce all of our immigration laws and eject everyone who has over stayed their Visas.
I'll wager that Medved heard "close the borders" and thought first and foremost about stopping Mexicans, which wouldn't have done anything.
Of course, that's all conjecture.
I have a very bad feeling that we are going to have to suffer another terrorist attack to figure out that controlling our border matters. If I want to keep burglars and bad guys out of my house, I better lock all the doors and windows. If I was to say that since the last time the burglar came in the back door, that is all I had to lock to secure the building, most people would see the common sense of locking the whole place up instead. What I do detect from this administration is political pandering to the Hispanic community, in spite of the pols which show Americans are quite willing to pay more for lettuce (and whatever other items illegals are used to produce) to protect our country.
Medved's question was why Liberals say we shouldn't try to kill the terrorists before they try and kill us.
The caller - an immigration sole-issue wacko - called up and tried to convince Medved that by removing all the troops from Iraq, Afghanistan, etc., and placing them along our borders, that would make us immune to terrorism
Medved asked the caller if his "solution" would have stopped 9/11 and - like this one issue wacko and so many before him - the caller realized the stupidity of his proposal and couldn't get around it & started arguing all kinds of things.
Medved held his ground asking him to answer the question.
Caller finally admitted it wouldn't
Medved then noted that - so typical of wackos on this issue and others over the years - they're incapable of discussing anything without involving their pet issues.