So Santorum doesn't believe in separation of Church and State, as his stances on birth control and other issues clearly illustrate. His reaction to JFK solidifies that. good to know.
I think it's more that his version of Separation of Church and State differs from Yours. Bring it back to Locke. Would You want Judges Dictating on Matters of Salvation, or matters of Doctrine or Dogma? No. Would you want Clergy Dictating on Matters of State, with Force of Law? No. It's in the specifics, the details, that you would find agreement.