It's understandable for people to collectively react negatively to genocidal tropes getting pushed once more with great enthusiasm. This shit never goes away, and Nazis were not in the least theoretical: one could say what made Nazis Nazis was a game plan, one that's very specific.

Also, the keystone of progressive dogma is that there is VALUE in the wellbeing of all types of people, contrasting with conservative dogma that hierarchy is both inevitable and deeply moral: that there are and will always be underpeople, which must be kept in their place.

Progressive dogma is more akin to your basic Ratatouille trope: that the good idea, the new concept, the innovation can come from ANYWHERE. I think that's a defensible position, and it puts a completely different spin on the idea of not starving the underpeople to death or killing them outright.