Something's wrong, here. I am agreeing with Rod Dreher over Andrew Sullivan! This is a first, but I fear Sully is joining the left in what Dreher describes:
"The Left has an ugly habit of trying to shut down debate by imputing bigotry to its opponents. Don't like what someone has to say critical of affirmative action? Call them racist. It's a great rhetorical move, because if you can get people to believe it, you've discredited your opponent -- because nobody has to take the views of a racist seriously -- without ever having engaged his argument."
You can disagree with Santorum (as I do, Rod Dreher does, and almost all of National Review magazine seems to), yet not call for him to resign his leadership position.
Sullivan makes a reasonable and heartfelt argument but I cannot join him here.