She has resigned in disgrace before.
I was going to reply to your point until I read
maomao's post, and I think he has it spot on.
I don't think she felt disgraced. This was her apology for the Israel meetings:
She's sorry that she was misunderstood and she's sorry she got caught.
We might all think she's disgraced, but it is a mark of the overweening self-regard she appears to hold herself in that she, really, couldn't give a fuck about what anyone thought about her Israel adventures - as far as she is concerned, she was right, and anyone saying otherwise is Just Plain Wrong. And not just on the Israel thing.
That seems to run through quite a lot of her behaviour, like writing through a stick of rock, and I think she's just got a very bad case of Politician Disease - the illness that says you must never, ever admit you're wrong, or that someone else has a point. And she's a critical case of that.
I notice that she's now claiming that she no longer holds the views on the death penalty she publicly held less than a decade ago. I don't believe her on that, either - she blows with the prevailing political wind, and she will be well aware that the appetite for the kind of viciousness she specialises in has diminished, so she's toning it down. I'd bet dollars to donuts that, given one iota of an opportunity, and she'd be back in among it with the "hang 'em high" brigade like she never left.
A vile specimen of humanity.