If it was meant as a direct reference to the Holocaust, she deserves to be sacked.
And if she didn't realise it could be taken as such, then she probably also still deserves to be sacked for her stupidity, naivety or lack of knowledge.
And I realise, DiP, that you are probably not defending her
She's a relatively intelligent and well-informed person. If she didn't realise the implications of what she was saying, she deserves to be sacked anyway.
And you're unbelievably naïve.