I think I've stated the problem quite succintly.
The problem is that American conservatives (and, as I often notice, conservatives in other countries, too), are insufficiently aggressive. You take pains to remind me that you are (like me) a believer in objective morality. Yet, if we are facing an immoral system (yes, here: There is a System and there is a Man, I said it), then it is our sacred moral duty as human beings to struggle to overthrow it. By this of course I do not mean that we must grab our rifles and rise up, I mean that we must constantly practice political aggression - repeal, de-regulate, de-fund and destroy the welfare state.
However, it seems a lot of people have resigned themselves to this being supposedly impossible. We are all too willing to forgive people who are on our side if they use our rhetoric or pay lip service to our ideas.
Now, it is not that I am a third-party voter. I voted for a moderate party only two days ago. But it is important to realize that there are moderates and then there are moderates. I have no problem with a man who wants less change than I want. I have a problem with a man like Gregg who wants to essentially be a Progressive but call himself a Republican.