We're only fooling ourselves if we try to distance ourselves from the crimes committed by the nazi's "because it was done by them evil nazi's". It wasn't just them. We all tried out the racial hygiene thingy. We all listed different groups of humans on a scale from "worthless" to "godlike". And some of it continued well after 1945, like gypsies being neutered and put in missionary camps to "turn the savages into humans" in Norway in the 60's(or sometime around then).

We've all done it. The nazi's just put the theory to the test on a much larger scale.