Personally, I don’t blame her for being pissed. She had no way of knowing the interpreter screwed up. She was asked a question that was, in reality, an insult. I am NO Hillary fan either.
I agree however she’s the main diplomat and that wasn’t very diplomatic. You have to maintain a better profile than that. Even if you are asked an insulting question, you must remain dignified. She represents the country in that setting. There’s no excusing her answer no matter how insulted she was.