My friend who brought me to the ML side of things (i still technically call myself a Luxembourgist but whatever, I'm effectively an ML at this point) told me that the thing with the Doctor's plot is that it was genuinly kind of a legitimate bad on Stalin's part, but it wasn't motivated by genuine antisemitism, just old man paranoia. But idk thats a sourceless claim from a third party I bet someone else will come along with something better.