A thing she refused to do with the Dothraki (twice.) And in Qarth. And in Astapoor. And in Yunkai. And in Mereen. And in Westeros last season. But now she just had to, even at the expense of her actual goal (taking down the Red Keep?)

I mean, if "Bitch just crazy" is the explanation you're going with, ok. But there's no reason to pretend it was a well executed story.