Just the obvious fact that Sanford has aided and abetted all of the above in their efforts to marginalize all things small government and conservative. And, since he should have known better (to put it mildly), is worthy of every bit as much contempt as those on your list, if not more. The Sanfords, Craigs, Foleys of the Republican party have done incalculable damage. They are scum of the lowest order.
And hasn't it become obvious to you over the last couple of weeks that Sanford is far too self absorbed and down right childish to be anywhere near power? Defending idiots like him is not a productive activity for anybody that seriously wishes advancement of conservative causes.
Craig and Foley resigned under withering criticism from both the Left and the Right. The Left, which joyously promotes homosexuality and defends so-called "gay rights," beat the drum against Craig and Foley only for political advantage. Instead of smartly hosing the Left by casting its criticism of Craig as "homophobia," the Right instead piled on him, amplifying the Left's meme; "The Republican Culture of Corruption!" That stupid move likely cost Republicans the 2006 Congressional--a key event leading to where we are today. Republicans zealously helped get rid of Craig, but look at the overall cost to the Republican Party and the implementation of its generally conservative agendas.
An interesting question is: In "Sanford" or "Craig" moments, what is best for rightwingers to do for America? Should we help promote the inherent morality of our beliefs by attacking rightwingers at the expense of handing our leftist enemies political advantage? Or should we instead privately deal with and discipline our wayward sons?
There are plenty of morally indignant conservatives and Republicans; those who stayed home or voted for 0bama on election night last year to punish the Republican Party, who, in my opinion, answered that question incorrectly. Is our assistance in the public destruction of someone basically in our ideological camp, worth the price to our nation? If we want to blunt the Left's attacks when a rightwing politician screws up in his personal life, we should study its successful tactics in defending Barney Frank and Gary Studds--two truly loathesome dirtbags who did worse than Sanford did. And we should heed the advice of Ronald Reagan who advised we should not publicly criticize or publicly brawl with those in our camp.
And yeah, Sanford is an absolute nitwit for feeding the fire by going "live" with his adolescent, pathetic confession and sappy, public declaration of "love." In that sense he brought much of the heat down on himself. Idiot. Didn't anyone in the RNC advise him to just clam up and let things die down?