The same can be said of (pseudo-)scientific thinking of materialists in the eugenic movements. The Nazis (Godwin's Law!) didn't go after Jews for religious reasons, but for genetic reasons.

The (nominally) Christian Germans were also planning to exterminate Poles because they were of inferior Slavic lineage (not caring that they were Christian/Catholic):

* https://en.wikipedia.org/wiki/Generalplan_Ost