If a journalist asked Colin Powell if he was an uncle Tom doing the bidding of whitey, I wouldn't blame Powell for getting a little steamed. And I doubt you would either.
I don't understand how this is such a major diplomatic faux paus. She was asked an outrageous, condescending and intentionally sexist question, and she gave a response that it deserved.
Most women, or most sane people would have told the "journalist" to fuck off. This isn't a major international diplomatic incident. It's just Hillary-haters indulging their hate fetish. No one is going to remember this a month from now. Its less than meaningless, and it wasn't an international diplomatic faux paus. Its just fodder for american rightwing media.