I'm afraid I just took Miranda's word for it so I assume we are meant to. I would give Marie Dobson the benefit of the doubt in 'End of Term' because she is in a special category of 'would like to', but Wendy Treadgold's comments do seem to immediately back up Miranda's case and I didn't notice they might not be motivated by anti-semitism. It's easy to imagine that there would be antisemites in Kingscote. On the other hand, Miranda's so ruthless in her enforcement of status within the school, that I can see how anyone might want to see her taken down a peg or two.
Her