I watched a clip of his interview where he tried to explain that.

He dug a hole even deeper. He said that he didn't like the idea of having to have no faith to be heard in the public square - WHICH WAS THE EXACT OPPOSITE OF WHAT JFK SAID.

JFK said he wanted people of *ALL* faiths to be heard in the public square. Santorum hears this and somehow replaces the "all" with "no".

I can easily see Santorum disliking JFK over that speech. JFK was answering critics who feared that the Vatican would hold sway over US policies if a Catholic was elected President. JFK specifically said the separation of Church and State was absolute. This is diametrically opposed to Rick Santorum's ideas of how (correct me if I'm wrong) Church can be very intertwined with State.

...the snarky side of me would add "...well, only *approved* or *real* religions" as I don't think Santorum would take even the most peace-loving Imam as an advisor. To be honest, I wonder if he believes that Romney is a Christian. I'm not making an accusation, I'm just curious in light of the comments he made about Obama that he later clarified.