Oh, I didn't mean it was particularly challenging - at least, as long as you avoid the antipattern of modelling them as Evil Monsters - just that it was a good exercise for this sort of thing. Indeed, I think most people can model the antisemitism (if not the philosophy and rhetorical/emotional power) by imagining society is being subverted by insidious alien Pod People.

You don't have to agree with a construction of the world to begin to see how it results in the avowed values that emerge from it, but you do have to be able to picture it properly.

Another excellent point.

A contemporary example of the same challenge is the cultures that practice female genital mutilation.

I don't know much about FGM or the cultures that practice it, but it might easily be analogous to so-called "male genital mutilation" or circumcision.