Nazis infiltrated, co-opted, perverted and used many institutions to further their political aims, and not just the church. Take, for instance, the Bauhaus. They recognized the need to make their propaganda materials not just emotionally compelling, but visually compelling as well. They weren't Christian in thought or deed. They fooled just enough people, just long enough, to consolidate their domination. Then, the horrors of the Reich began. And, what school of thought came to the fore, in implementing their "solution," their industrial genocide? Eugenics, with a straight line back to Darwin.
For someone lecturing on history, you should know that selective breeding of plants, animals and humans was going on for thousands of years before Darwin. All Darwin did was notice that it happend in nature without human intervention.
Wallace, who discovered natural selection independently, called it the tendency of varieties to diverge indefinitely.
Prior to Wallace and Darwin it was thought that varieties always reverted to the "mutt" form.
There is nothing in Wallace's or Darwin's writings that adds anything to the practice or literature of selective breeding.