Proof of concept
I think the Rev. Wright situation demonstrates the point I was making in my post below about what would happen if the Clinton/Obama situations were reversed. Consider that Wright made his comments at a time just after the New Hampshire primary when it looked like Clinton might retake the momentum in the race. Wright, as the above linked post at TPMCafe discusses, was almost palpably frustrated in his comments.
As in the Ferarro situation, Wright's frustration doesn't excuse the stupidity of the comments made. But it explains where they come from.