I remember your style of hand wringing a few years ago from folks like George Will that thought that the Conservative favorite was too out of the mainstream to be elected and that the more moderate choice was needed to be pushed. That was the 1980 election where Howard Baker and then Bush 1 were said to be way more electable than Reagan in the General.
Period. This is the attack that Zero will use.
Here are the headings for the question Santorum will face until his defeat should he get the nomination: - Abortion; - Contraception; - Religion; - Evolution; - Gay rights; and now: - Women in combat.
Santorum has made these issues his essence--and like it or not, agree with it or not, we don't win general elections on social issues.