While I don't think Rudy is the right presidential candidate for '08, I do echo what you say about not all conservatives being social conservatives. I would even expand that to say not all conservatives are militant social conservatives. I am pro-life (exceptions being made for rape, incest, and danger to the life of the baby or the mother) and I do agree with MOST points made by social conservatives. However, those are not my main issues. While important, I don't think they come close to the issues of foreign policy, taxation, and the economy.
The battles fought by social conservatives, while very important, should mostly be fought in society by churches and their membership, not in political debate.
I am very active in the Republican Party and have noticed a recent resurgence of the social conservative movement, very closely akin to the '88 surge on the behalf of Pat Robertson's candidacy. We have to be careful to make sure there is a good mix of fiscal conservatives, social conservatives, and moderates leading the party. When one faction controls everything, our chances of winning become zilch!
When you choose a presidential nominee, that candidate should be acceptable to all major elements of the party. Choosing a social conservative this time, then a social liberal next time, doesn't work.
To re-phrase, When you pick a candidate who is unacceptable to one faction of the party, our chances of winning become zilch!